No problem, we've got 7990 and 4980 to multiply
7990 × 4980 = 4980 × (7990)
+ 4980 × 0 giving us 0
+ 4980 × 90 which equals 448200
+ 4980 × 900 which equals 4482000
+ 4980 × 7000 that is equal 34860000

= 39790200
