Alright, let's work through 79880747 times 91877481 step by step
79880747 × 91877481 = 91877481 × (79880747)
+ 91877481 × 7 producing 643142367
+ 91877481 × 40 yielding 3675099240
+ 91877481 × 700 producing 64314236700
+ 91877481 × 0000 yielding 0
+ 91877481 × 80000 which equals 7350198480000
+ 91877481 × 800000 that results in 73501984800000
+ 91877481 × 9000000 what gives us 826897329000000
+ 91877481 × 70000000 what gives us 6431423670000000

= 7339241814758307
