Alright, let's work through 72886321 times 51537323 step by step
72886321 × 51537323 = 51537323 × (72886321)
+ 51537323 × 1 giving us 51537323
+ 51537323 × 20 resulting in 1030746460
+ 51537323 × 300 giving us 15461196900
+ 51537323 × 6000 what gives us 309223938000
+ 51537323 × 80000 giving us 4122985840000
+ 51537323 × 800000 giving us 41229858400000
+ 51537323 × 2000000 what gives us 103074646000000
+ 51537323 × 70000000 what gives us 3607612610000000

= 3756365867658683
