Alright, let's work through 3961 times 3320 step by step
3961 × 3320 = 3320 × (3961)
+ 3320 × 1 which equals 3320
+ 3320 × 60 that results in 199200
+ 3320 × 900 that equals 2988000
+ 3320 × 3000 which equals 9960000

= 13150520
