Alright, let's work through 72815949 times 51136234 step by step
72815949 × 51136234 = 51136234 × (72815949)
+ 51136234 × 9 yielding 460226106
+ 51136234 × 40 which equals 2045449360
+ 51136234 × 900 what gives us 46022610600
+ 51136234 × 5000 that is equal 255681170000
+ 51136234 × 10000 yielding 511362340000
+ 51136234 × 800000 resulting in 40908987200000
+ 51136234 × 2000000 that is equal 102272468000000
+ 51136234 × 70000000 that results in 3579536380000000

= 3723533406996066
