Alright, let's work through 3315 times 3668 step by step
3315 × 3668 = 3668 × (3315)
+ 3668 × 5 which equals 18340
+ 3668 × 10 that equals 36680
+ 3668 × 300 that equals 1100400
+ 3668 × 3000 that is equal 11004000

= 12159420
