No problem, we've got 7780 and 8663 to multiply
7780 × 8663 = 8663 × (7780)
+ 8663 × 0 what gives us 0
+ 8663 × 80 which equals 693040
+ 8663 × 700 yielding 6064100
+ 8663 × 7000 giving us 60641000

= 67398140
