3671 ÷ 8 = 458 R7
We're going to perform division on 3671 with 8 as the divisor.

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 (6) of the dividend behind the 3 and repeat the process: 36 / 8

Step 2:
8 goes into 36 4 times with a remainder of 4.
Write down 4 as next digit of of the result. 
Result so far: 4
Subtract 32 from 36 to get 4.
Bring next digit (7) of the dividend behind the 4 and repeat the process: 47 / 8

Step 3:
8 goes into 47 5 times with a remainder of 7.
Write down 5 as next digit of of the result. 
Result so far: 45
Subtract 40 from 47 to get 7.
Bring next digit (1) of the dividend behind the 7 and repeat the process: 71 / 8

Step 4:
8 goes into 71 8 times with a remainder of 7.
Write down 8 as next digit of of the result. 
Result so far: 458
Subtract 64 from 71 to get 7.

The final result is 458 with a remainder of 7.