Alright, let's work through 8428 times 1311 step by step
8428 × 1311 = 1311 × (8428)
+ 1311 × 8 resulting in 10488
+ 1311 × 20 that is equal 26220
+ 1311 × 400 which equals 524400
+ 1311 × 8000 yielding 10488000

= 11049108
