No problem, we've got 6486 and 6641 to multiply
6486 × 6641 = 6641 × (6486)
+ 6641 × 6 what gives us 39846
+ 6641 × 80 giving us 531280
+ 6641 × 400 that is equal 2656400
+ 6641 × 6000 which equals 39846000

= 43073526
