Alright, let's work through 72409481 times 242357 step by step
72409481 × 242357 = 242357 × (72409481)
+ 242357 × 1 yielding 242357
+ 242357 × 80 resulting in 19388560
+ 242357 × 400 that is equal 96942800
+ 242357 × 9000 that equals 2181213000
+ 242357 × 00000 producing 0
+ 242357 × 400000 resulting in 96942800000
+ 242357 × 2000000 producing 484714000000
+ 242357 × 70000000 resulting in 16964990000000

= 17548944586717
