Alright, let's work through 6420 times 9541 step by step
6420 × 9541 = 9541 × (6420)
+ 9541 × 0 what gives us 0
+ 9541 × 20 that results in 190820
+ 9541 × 400 what gives us 3816400
+ 9541 × 6000 what gives us 57246000

= 61253220
