No problem, we've got 3957 and 5540 to multiply
3957 × 5540 = 5540 × (3957)
+ 5540 × 7 that results in 38780
+ 5540 × 50 resulting in 277000
+ 5540 × 900 yielding 4986000
+ 5540 × 3000 that is equal 16620000

= 21921780
