No problem, we've got 6657 and 6416 to multiply
6657 × 6416 = 6416 × (6657)
+ 6416 × 7 yielding 44912
+ 6416 × 50 what gives us 320800
+ 6416 × 600 that is equal 3849600
+ 6416 × 6000 which equals 38496000

= 42711312
