Alright, let's work through 8420 times 4963 step by step
8420 × 4963 = 4963 × (8420)
+ 4963 × 0 yielding 0
+ 4963 × 20 what gives us 99260
+ 4963 × 400 that is equal 1985200
+ 4963 × 8000 yielding 39704000

= 41788460
