Alright, let's work through 3231 times 3631 step by step
3231 × 3631 = 3631 × (3231)
+ 3631 × 1 yielding 3631
+ 3631 × 30 yielding 108930
+ 3631 × 200 giving us 726200
+ 3631 × 3000 that is equal 10893000

= 11731761
