3146 ÷ 8 = 393 R2
Alright, let's work through the division of 3146 by 8 step by step.

Step 1:
8 goes into 3 0 times with a remainder of 3.
Write down 0 as next digit of of the result. 
Result so far: 0
Subtract 0 from 3 to get 3.
Bring next digit (1) of the dividend behind the 3 and repeat the process: 31 / 8

Step 2:
8 goes into 31 3 times with a remainder of 7.
Write down 3 as next digit of of the result. 
Result so far: 3
Subtract 24 from 31 to get 7.
Bring next digit (4) of the dividend behind the 7 and repeat the process: 74 / 8

Step 3:
8 goes into 74 9 times with a remainder of 2.
Write down 9 as next digit of of the result. 
Result so far: 39
Subtract 72 from 74 to get 2.
Bring next digit (6) of the dividend behind the 2 and repeat the process: 26 / 8

Step 4:
8 goes into 26 3 times with a remainder of 2.
Write down 3 as next digit of of the result. 
Result so far: 393
Subtract 24 from 26 to get 2.

The final result is 393 with a remainder of 2.