Alright, let's work through 72940031 times 16940429 step by step
72940031 × 16940429 = 16940429 × (72940031)
+ 16940429 × 1 what gives us 16940429
+ 16940429 × 30 resulting in 508212870
+ 16940429 × 000 giving us 0
+ 16940429 × 0000 resulting in 0
+ 16940429 × 40000 that results in 677617160000
+ 16940429 × 900000 yielding 15246386100000
+ 16940429 × 2000000 that equals 33880858000000
+ 16940429 × 70000000 which equals 1185830030000000

= 1235635416413299
