No problem, we've got 2139 and 561 to multiply
2139 × 561 = 561 × (2139)
+ 561 × 9 which equals 5049
+ 561 × 30 that is equal 16830
+ 561 × 100 which equals 56100
+ 561 × 2000 that equals 1122000

= 1199979
