No problem, we've got 8680 and 9980 to multiply
8680 × 9980 = 9980 × (8680)
+ 9980 × 0 which equals 0
+ 9980 × 80 what gives us 798400
+ 9980 × 600 that results in 5988000
+ 9980 × 8000 giving us 79840000

= 86626400
