No problem, we've got 6642 and 3160 to multiply
6642 × 3160 = 3160 × (6642)
+ 3160 × 2 yielding 6320
+ 3160 × 40 that equals 126400
+ 3160 × 600 that results in 1896000
+ 3160 × 6000 that is equal 18960000

= 20988720
