Alright, let's work through 6420 times 2980 step by step
6420 × 2980 = 2980 × (6420)
+ 2980 × 0 yielding 0
+ 2980 × 20 resulting in 59600
+ 2980 × 400 which equals 1192000
+ 2980 × 6000 that is equal 17880000

= 19131600
