Alright, let's work through 8425 times 6640 step by step
8425 × 6640 = 6640 × (8425)
+ 6640 × 5 giving us 33200
+ 6640 × 20 which equals 132800
+ 6640 × 400 that is equal 2656000
+ 6640 × 8000 producing 53120000

= 55942000
