Alright, let's work through 21350999 times 87721000 step by step
21350999 × 87721000 = 87721000 × (21350999)
+ 87721000 × 9 producing 789489000
+ 87721000 × 90 that is equal 7894890000
+ 87721000 × 900 yielding 78948900000
+ 87721000 × 0000 that equals 0
+ 87721000 × 50000 yielding 4386050000000
+ 87721000 × 300000 what gives us 26316300000000
+ 87721000 × 1000000 that results in 87721000000000
+ 87721000 × 20000000 producing 1754420000000000

= 1872930983279000
