No problem, we've got 7880 and 9928 to multiply
7880 × 9928 = 9928 × (7880)
+ 9928 × 0 what gives us 0
+ 9928 × 80 resulting in 794240
+ 9928 × 800 giving us 7942400
+ 9928 × 7000 which equals 69496000

= 78232640
