Alright, let's work through 4131 times 2938 step by step
4131 × 2938 = 2938 × (4131)
+ 2938 × 1 yielding 2938
+ 2938 × 30 that results in 88140
+ 2938 × 100 that is equal 293800
+ 2938 × 4000 resulting in 11752000

= 12136878
