Alright, let's work through 8409 times 9880 step by step
8409 × 9880 = 9880 × (8409)
+ 9880 × 9 producing 88920
+ 9880 × 00 giving us 0
+ 9880 × 400 what gives us 3952000
+ 9880 × 8000 that is equal 79040000

= 83080920
