Alright, let's work through 3131 times 2112 step by step
3131 × 2112 = 2112 × (3131)
+ 2112 × 1 what gives us 2112
+ 2112 × 30 giving us 63360
+ 2112 × 100 which equals 211200
+ 2112 × 3000 that results in 6336000

= 6612672
