Alright, let's work through 7710 times 3982 step by step
7710 × 3982 = 3982 × (7710)
+ 3982 × 0 what gives us 0
+ 3982 × 10 giving us 39820
+ 3982 × 700 what gives us 2787400
+ 3982 × 7000 what gives us 27874000

= 30701220
