Alright, let's work through 8420 times 3492 step by step
8420 × 3492 = 3492 × (8420)
+ 3492 × 0 that results in 0
+ 3492 × 20 what gives us 69840
+ 3492 × 400 which equals 1396800
+ 3492 × 8000 which equals 27936000

= 29402640
