No problem, we've got 3988 and 4646 to multiply
3988 × 4646 = 4646 × (3988)
+ 4646 × 8 what gives us 37168
+ 4646 × 80 resulting in 371680
+ 4646 × 900 that equals 4181400
+ 4646 × 3000 that results in 13938000

= 18528248
