Alright, let's work through 72315738 times 15917913 step by step
72315738 × 15917913 = 15917913 × (72315738)
+ 15917913 × 8 that is equal 127343304
+ 15917913 × 30 that is equal 477537390
+ 15917913 × 700 yielding 11142539100
+ 15917913 × 5000 that is equal 79589565000
+ 15917913 × 10000 producing 159179130000
+ 15917913 × 300000 that is equal 4775373900000
+ 15917913 × 2000000 yielding 31835826000000
+ 15917913 × 70000000 yielding 1114253910000000

= 1151115626014794
