No problem, we've got 3873 and 5679 to multiply
3873 × 5679 = 5679 × (3873)
+ 5679 × 3 what gives us 17037
+ 5679 × 70 that is equal 397530
+ 5679 × 800 that equals 4543200
+ 5679 × 3000 giving us 17037000

= 21994767
