Alright, let's work through 21321498 times 20404797 step by step
21321498 × 20404797 = 20404797 × (21321498)
+ 20404797 × 8 which equals 163238376
+ 20404797 × 90 producing 1836431730
+ 20404797 × 400 resulting in 8161918800
+ 20404797 × 1000 what gives us 20404797000
+ 20404797 × 20000 what gives us 408095940000
+ 20404797 × 300000 yielding 6121439100000
+ 20404797 × 1000000 what gives us 20404797000000
+ 20404797 × 20000000 that results in 408095940000000

= 435060838425906
