Alright, let's work through 71900701 times 64355329 step by step
71900701 × 64355329 = 64355329 × (71900701)
+ 64355329 × 1 what gives us 64355329
+ 64355329 × 00 that results in 0
+ 64355329 × 700 that results in 45048730300
+ 64355329 × 0000 producing 0
+ 64355329 × 00000 yielding 0
+ 64355329 × 900000 giving us 57919796100000
+ 64355329 × 1000000 which equals 64355329000000
+ 64355329 × 70000000 yielding 4504873030000000

= 4627193268185629
