Alright, let's work through 3955 times 4208 step by step
3955 × 4208 = 4208 × (3955)
+ 4208 × 5 giving us 21040
+ 4208 × 50 which equals 210400
+ 4208 × 900 resulting in 3787200
+ 4208 × 3000 giving us 12624000

= 16642640
