Alright, let's work through 6402 times 6632 step by step
6402 × 6632 = 6632 × (6402)
+ 6632 × 2 that results in 13264
+ 6632 × 00 what gives us 0
+ 6632 × 400 yielding 2652800
+ 6632 × 6000 producing 39792000

= 42458064
