Alright, let's work through 71548409 times 72399658 step by step
71548409 × 72399658 = 72399658 × (71548409)
+ 72399658 × 9 giving us 651596922
+ 72399658 × 00 producing 0
+ 72399658 × 400 yielding 28959863200
+ 72399658 × 8000 giving us 579197264000
+ 72399658 × 40000 yielding 2895986320000
+ 72399658 × 500000 that equals 36199829000000
+ 72399658 × 1000000 resulting in 72399658000000
+ 72399658 × 70000000 that is equal 5067976060000000

= 5180080342044122
