No problem, we've got 6641 and 1399 to multiply
6641 × 1399 = 1399 × (6641)
+ 1399 × 1 yielding 1399
+ 1399 × 40 that equals 55960
+ 1399 × 600 giving us 839400
+ 1399 × 6000 that equals 8394000

= 9290759
