Alright, let's work through 3121 times 1148 step by step
3121 × 1148 = 1148 × (3121)
+ 1148 × 1 yielding 1148
+ 1148 × 20 producing 22960
+ 1148 × 100 producing 114800
+ 1148 × 3000 that is equal 3444000

= 3582908
