Alright, let's work through 6720 times 3097 step by step
6720 × 3097 = 3097 × (6720)
+ 3097 × 0 what gives us 0
+ 3097 × 20 what gives us 61940
+ 3097 × 700 yielding 2167900
+ 3097 × 6000 which equals 18582000

= 20811840
