Alright, let's work through 21200906 times 32111764 step by step
21200906 × 32111764 = 32111764 × (21200906)
+ 32111764 × 6 which equals 192670584
+ 32111764 × 00 resulting in 0
+ 32111764 × 900 that equals 28900587600
+ 32111764 × 0000 yielding 0
+ 32111764 × 00000 giving us 0
+ 32111764 × 200000 that equals 6422352800000
+ 32111764 × 1000000 yielding 32111764000000
+ 32111764 × 20000000 producing 642235280000000

= 680798490058184
