Alright, let's work through 21396982 times 72249581 step by step
21396982 × 72249581 = 72249581 × (21396982)
+ 72249581 × 2 that is equal 144499162
+ 72249581 × 80 producing 5779966480
+ 72249581 × 900 yielding 65024622900
+ 72249581 × 6000 giving us 433497486000
+ 72249581 × 90000 resulting in 6502462290000
+ 72249581 × 300000 yielding 21674874300000
+ 72249581 × 1000000 that is equal 72249581000000
+ 72249581 × 20000000 producing 1444991620000000

= 1545922984164542
