Alright, let's work through 72405300 times 97713281 step by step
72405300 × 97713281 = 97713281 × (72405300)
+ 97713281 × 0 yielding 0
+ 97713281 × 00 that equals 0
+ 97713281 × 300 that equals 29313984300
+ 97713281 × 5000 giving us 488566405000
+ 97713281 × 00000 giving us 0
+ 97713281 × 400000 yielding 39085312400000
+ 97713281 × 2000000 giving us 195426562000000
+ 97713281 × 70000000 what gives us 6839929670000000

= 7074959424789300
