No problem, we've got 8900 and 7990 to multiply
8900 × 7990 = 7990 × (8900)
+ 7990 × 0 that equals 0
+ 7990 × 00 yielding 0
+ 7990 × 900 what gives us 7191000
+ 7990 × 8000 yielding 63920000

= 71111000
