39021 ÷ 5 = 7804 R1
We're going to perform division on 39021 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 (0) of the dividend behind the 4 and repeat the process: 40 / 5

Step 3:
5 goes into 40 8 times with a remainder of 0.
Write down 8 as next digit of of the result. 
Result so far: 78
Subtract 40 from 40 to get 0.
Bring next digit (2) of the dividend behind the 0 and repeat the process: 2 / 5

Step 4:
5 goes into 2 0 times with a remainder of 2.
Write down 0 as next digit of of the result. 
Result so far: 780
Subtract 0 from 2 to get 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 5

Step 5:
5 goes into 21 4 times with a remainder of 1.
Write down 4 as next digit of of the result. 
Result so far: 7804
Subtract 20 from 21 to get 1.

The final result is 7804 with a remainder of 1.