Alright, let's work through 6403 times 7070 step by step
6403 × 7070 = 7070 × (6403)
+ 7070 × 3 that results in 21210
+ 7070 × 00 yielding 0
+ 7070 × 400 that is equal 2828000
+ 7070 × 6000 that is equal 42420000

= 45269210
