Alright, let's work through 72040239 times 86040378 step by step
72040239 × 86040378 = 86040378 × (72040239)
+ 86040378 × 9 which equals 774363402
+ 86040378 × 30 producing 2581211340
+ 86040378 × 200 that results in 17208075600
+ 86040378 × 0000 that results in 0
+ 86040378 × 40000 yielding 3441615120000
+ 86040378 × 000000 that results in 0
+ 86040378 × 2000000 what gives us 172080756000000
+ 86040378 × 70000000 that is equal 6022826460000000

= 6198369394770342
