No problem, we've got 6663 and 3500 to multiply
6663 × 3500 = 3500 × (6663)
+ 3500 × 3 that equals 10500
+ 3500 × 60 which equals 210000
+ 3500 × 600 that is equal 2100000
+ 3500 × 6000 which equals 21000000

= 23320500
