Alright, let's work through 72453354 times 53489321 step by step
72453354 × 53489321 = 53489321 × (72453354)
+ 53489321 × 4 which equals 213957284
+ 53489321 × 50 that results in 2674466050
+ 53489321 × 300 which equals 16046796300
+ 53489321 × 3000 that equals 160467963000
+ 53489321 × 50000 resulting in 2674466050000
+ 53489321 × 400000 yielding 21395728400000
+ 53489321 × 2000000 that equals 106978642000000
+ 53489321 × 70000000 producing 3744252470000000

= 3875480709632634
