Do the math and you can come to the conclusion it was the biggest play of a wild and crazy game.

It could get lost in the swirl of mayhem at the end but when adding up the hows and whys of the Giants’ 24-22 victory over the Packers, a successful two-point conversion stop on defense was a classic example of bending but not breaking and giving the team another chance to find a way to win.

Saquon Barkley turned sure victory into what looked to be a cataclysmic failure when he lost his footing at the end of a 34-yard run. The burst by Barkley with four minutes remaining and the Giants leading 21-16 put the Giants on the Green Bay 18-yard line with 3:34 remaining.

The ensuing unforced fumble by Barkley when he hit the ground was recovered by Carrington Valentine and returned 50 yards to the Giants’ 36-yard line.

The sudden change put the defense in a tough spot and it became even tougher when Jordan Love, with 1:36 left, hit rookie Malik Heath on a six-yard touchdown pass to put the Packers ahead, 22-21.

The Giants should have been reeling at this point but they steadied themselves for what came next.

The Packers went for two, trying to make it a three-point lead. The call from Packers coach Matt LaFleur was an inside handoff jet sweep for rookie wide receiver Jayden Reed, moving right to left, hoping to confuse a Giants defense that did not handle a similar play in the first quarter, as Reed took it 16 yards and was untouched running into the end zone for a touchdown. LaFleur went with that play a few more times in the game and the Giants snuffed it out.

This time, the Giants were ready for it.

Inside linebacker Bobby Okereke dissected what the Packers were doing and dropped Reed one yard short of the goal line. The Packers’ lead stayed at one point, setting up the fantastic finish for Tommy DeVito, allowing the Giants to get a 37-yard field goal at the buzzer from Randy Bullock to win the game.

Had the two-point conversion succeeded, Bullock’s field goal would have merely sent the game into overtime.

“That was a big two-point conversion at the end but that’s the NFL, every down, every situation is important and we’re playing with great situational awareness right now,’’ Okereke told The Post afterward. “Just next play mentality. That was kind of one of their go-to plays, obviously a got-to-have-it situation, just playing with awareness and anticipation.’’

Looking back, LaFleur was asked why he went back to Reed on that particular play, when it seemed as if the Giants were ready for it.

“Yeah, it’s just obviously a bad call,’’ LaFleur said.

More that came out of a rare “Monday Night Football’’ victory for the Giants:

Just how rare was it? Once the sun goes down, the Giants are usually at their worst. It is as if they are the New York Nychtophobias.

Heading into this game, the Giants were 1-16 in their previous 17 regular-season night games. They had lost nine consecutive home night games. They had not won a primetime game at MetLife Stadium in seven years. They were 0-4 in primetime games this season.

After coming back to beat the Packers, the Giants are now 16-47-1 all-time on Monday night.

A walk-off field goal is not commonplace around the Giants when it comes to them coming out ahead.

Before Bullock’s game-winner, the last time it happened for the Giants was more than seven years ago, when Josh Brown nailed a 23-yarder to beat the Saints 16-13 early in the 2016 season.

There are so many milestones for an NFL quarterback.

First snap. First completion. First touchdown. First win.

DeVito is checking these off, one by one, and he added another notch to his belt in this game: first fourth-quarter comeback victory.

The scenario he was thrust into was a classic end-of-game challenge, the sort of scenario that is worked on during training camp every summer.

Down one point, 1:33 remaining, two timeouts remaining. The assignment: Get in field goal range.

DeVito hit Wan’Dale Robinson for five yards, found Barkley for seven yards, located Darius Slayton for nine yards, with Slayton able to get out of bounds to stop the clock with 42 seconds to go.

The huge play was a 32-yard strike to Robinson along the right sideline to the Green Bay 22-yard line.

All that was left was for Barkley to kill time with three runs into the middle before Bullock from a comfortable range hit the game-winner.

DeVito was 4-for-4 for 53 yards on the game-winning drive.

What a remarkable turn of events for Barkley.

If the comeback did not materialize, his lost fumble would have stood as a crushing moment for the 26-year-old running back. He called the unforced turnover “inexcusable’’ and moving past it, had the Giants lost, would have been an extremely difficult mental challenge for him.

Barkley longs to stay with the Giants and be with the franchise for the turnaround and success he believes is coming soon. He does not have a contract for the 2024 season and there is no way to tell at this point if he will get one. Too often, Barkley is asked to don a cape and be a hero for the Giants.

This time, he was picked up by his teammates and his gaffe, while embarrassing to him, did not lead to a devastating loss and thus it will not be a lasting agony for him to process.

With his 186 rushing yards, Barkley became the fifth player in franchise history to run for 5,000 yards. Barkley now has 5,032 rushing yards in his six-year career.

Up next for him: Brandon Jacobs, fourth on the Giants rushing list with 5,087 yards.

With three receptions for 15 yards, Barkley became the fourth Giants player with 5,000 rushing yards and 2,000 receiving yards. He has 2,003 career receiving yards.

Isaiah Hodgins was signed during the 2022 season and turned into the biggest playmaker in the passing game down the stretch. Is he doing it again?

Hodgins made a high degree of difficulty grab in the right corner of the end zone for an eight-yard touchdown reception late in the third quarter to put the Giants ahead, 21-13. It was Hodgins’ second touchdown in the past two games. He has three touchdown catches this season. Remarkably, that puts him second on the team, behind Barkley — who has seven — for the team lead in touchdowns.

This is a strange one. It has become commonplace for teams to win the opening coin toss and defer its possession until the second half, opting to kick off and give the opponent the ball first. That has happened in all 13 games the Giants played this season, before this one.

This time, the Packers won the toss and LaFleur, looking for a quick start, elected to receive and put his offense on the field first. It did not work out for the Packers, as they picked up one first down on their opening possession but then had to punt the ball away.

This was out of the ordinary for the Packers. LaFleur had been 16-0 in his coaching career in December games.