No problem, we've got 6289 and 6680 to multiply
6289 × 6680 = 6680 × (6289)
+ 6680 × 9 resulting in 60120
+ 6680 × 80 yielding 534400
+ 6680 × 200 which equals 1336000
+ 6680 × 6000 what gives us 40080000

= 42010520
