Alright, let's work through 8480 times 921 step by step
8480 × 921 = 921 × (8480)
+ 921 × 0 that is equal 0
+ 921 × 80 what gives us 73680
+ 921 × 400 that is equal 368400
+ 921 × 8000 what gives us 7368000

= 7810080
