Alright, let's work through 72871436 times 66307878 step by step
72871436 × 66307878 = 66307878 × (72871436)
+ 66307878 × 6 producing 397847268
+ 66307878 × 30 that results in 1989236340
+ 66307878 × 400 resulting in 26523151200
+ 66307878 × 1000 which equals 66307878000
+ 66307878 × 70000 producing 4641551460000
+ 66307878 × 800000 giving us 53046302400000
+ 66307878 × 2000000 resulting in 132615756000000
+ 66307878 × 70000000 what gives us 4641551460000000

= 4831950287972808
