No problem, we've got 3787 and 5591 to multiply
3787 × 5591 = 5591 × (3787)
+ 5591 × 7 yielding 39137
+ 5591 × 80 what gives us 447280
+ 5591 × 700 that equals 3913700
+ 5591 × 3000 that results in 16773000

= 21173117
