No problem, we've got 4387 and 4877 to multiply
4387 × 4877 = 4877 × (4387)
+ 4877 × 7 that is equal 34139
+ 4877 × 80 producing 390160
+ 4877 × 300 what gives us 1463100
+ 4877 × 4000 giving us 19508000

= 21395399
