No problem, we've got 6689 and 2807 to multiply
6689 × 2807 = 2807 × (6689)
+ 2807 × 9 what gives us 25263
+ 2807 × 80 that is equal 224560
+ 2807 × 600 which equals 1684200
+ 2807 × 6000 that is equal 16842000

= 18776023
