No problem, we've got 4889 and 7990 to multiply
4889 × 7990 = 7990 × (4889)
+ 7990 × 9 giving us 71910
+ 7990 × 80 producing 639200
+ 7990 × 800 yielding 6392000
+ 7990 × 4000 what gives us 31960000

= 39063110
