No problem, we've got 7990 and 1983 to multiply
7990 × 1983 = 1983 × (7990)
+ 1983 × 0 that equals 0
+ 1983 × 90 that is equal 178470
+ 1983 × 900 that results in 1784700
+ 1983 × 7000 yielding 13881000

= 15844170
