Alright, let's work through 3355 times 3948 step by step
3355 × 3948 = 3948 × (3355)
+ 3948 × 5 giving us 19740
+ 3948 × 50 that is equal 197400
+ 3948 × 300 that is equal 1184400
+ 3948 × 3000 that equals 11844000

= 13245540
