No problem, we've got 7855 and 4002 to multiply
7855 × 4002 = 4002 × (7855)
+ 4002 × 5 resulting in 20010
+ 4002 × 50 yielding 200100
+ 4002 × 800 yielding 3201600
+ 4002 × 7000 which equals 28014000

= 31435710
