Alright, let's work through 3159 times 3116 step by step
3159 × 3116 = 3116 × (3159)
+ 3116 × 9 producing 28044
+ 3116 × 50 yielding 155800
+ 3116 × 100 yielding 311600
+ 3116 × 3000 producing 9348000

= 9843444
