Alright, let's work through 72431007 times 31877872 step by step
72431007 × 31877872 = 31877872 × (72431007)
+ 31877872 × 7 resulting in 223145104
+ 31877872 × 00 which equals 0
+ 31877872 × 000 which equals 0
+ 31877872 × 1000 yielding 31877872000
+ 31877872 × 30000 what gives us 956336160000
+ 31877872 × 400000 resulting in 12751148800000
+ 31877872 × 2000000 that equals 63755744000000
+ 31877872 × 70000000 yielding 2231451040000000

= 2308946369977104
