Alright, let's work through 7131 times 2181 step by step
7131 × 2181 = 2181 × (7131)
+ 2181 × 1 producing 2181
+ 2181 × 30 that is equal 65430
+ 2181 × 100 yielding 218100
+ 2181 × 7000 that equals 15267000

= 15552711
