39665 ÷ 5 = 7933 R0
We're going to perform division on 39665 with 5 as the divisor.

Step 1:
5 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 (9) of the dividend behind the 3 and repeat the process: 39 / 5

Step 2:
5 goes into 39 7 times with a remainder of 4.
Write down 7 as next digit of of the result. 
Result so far: 7
Subtract 35 from 39 to get 4.
Bring next digit (6) of the dividend behind the 4 and repeat the process: 46 / 5

Step 3:
5 goes into 46 9 times with a remainder of 1.
Write down 9 as next digit of of the result. 
Result so far: 79
Subtract 45 from 46 to get 1.
Bring next digit (6) of the dividend behind the 1 and repeat the process: 16 / 5

Step 4:
5 goes into 16 3 times with a remainder of 1.
Write down 3 as next digit of of the result. 
Result so far: 793
Subtract 15 from 16 to get 1.
Bring next digit (5) of the dividend behind the 1 and repeat the process: 15 / 5

Step 5:
5 goes into 15 3 times with a remainder of 0.
Write down 3 as next digit of of the result. 
Result so far: 7933
Subtract 15 from 15 to get 0.

The final result is 7933 with a remainder of 0.