Alright, let's work through 3161 times 1338 step by step
3161 × 1338 = 1338 × (3161)
+ 1338 × 1 resulting in 1338
+ 1338 × 60 which equals 80280
+ 1338 × 100 what gives us 133800
+ 1338 × 3000 what gives us 4014000

= 4229418
