No problem, we've got 6789 and 2136 to multiply
6789 × 2136 = 2136 × (6789)
+ 2136 × 9 that is equal 19224
+ 2136 × 80 which equals 170880
+ 2136 × 700 that is equal 1495200
+ 2136 × 6000 that is equal 12816000

= 14501304
