No problem, we've got 9091 and 6375 to multiply
9091 × 6375 = 6375 × (9091)
+ 6375 × 1 that equals 6375
+ 6375 × 90 what gives us 573750
+ 6375 × 000 that is equal 0
+ 6375 × 9000 yielding 57375000

= 57955125
