Alright, let's work through 64140421 times 48333574 step by step
64140421 × 48333574 = 48333574 × (64140421)
+ 48333574 × 1 yielding 48333574
+ 48333574 × 20 yielding 966671480
+ 48333574 × 400 producing 19333429600
+ 48333574 × 0000 which equals 0
+ 48333574 × 40000 which equals 1933342960000
+ 48333574 × 100000 yielding 4833357400000
+ 48333574 × 4000000 resulting in 193334296000000
+ 48333574 × 60000000 that is equal 2900014440000000

= 3100135784794654
