Alright, let's work through 6383405 times 21315022 step by step
6383405 × 21315022 = 21315022 × (6383405)
+ 21315022 × 5 what gives us 106575110
+ 21315022 × 00 what gives us 0
+ 21315022 × 400 that is equal 8526008800
+ 21315022 × 3000 yielding 63945066000
+ 21315022 × 80000 resulting in 1705201760000
+ 21315022 × 300000 that results in 6394506600000
+ 21315022 × 6000000 which equals 127890132000000

= 136062418009910
