Alright, let's work through 7311 times 2181 step by step
7311 × 2181 = 2181 × (7311)
+ 2181 × 1 giving us 2181
+ 2181 × 10 giving us 21810
+ 2181 × 300 that is equal 654300
+ 2181 × 7000 that equals 15267000

= 15945291
