No problem, we've got 6750 and 3131 to multiply
6750 × 3131 = 3131 × (6750)
+ 3131 × 0 what gives us 0
+ 3131 × 50 that is equal 156550
+ 3131 × 700 that is equal 2191700
+ 3131 × 6000 resulting in 18786000

= 21134250
