Alright, let's work through 5131 times 4191 step by step
5131 × 4191 = 4191 × (5131)
+ 4191 × 1 that results in 4191
+ 4191 × 30 which equals 125730
+ 4191 × 100 that equals 419100
+ 4191 × 5000 that equals 20955000

= 21504021
