Let's divide 939569 by 21
Our goal is to divide 939569 by 21.

On to step 1:
21 goes into 9 0 times with a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Append the next digit (3) from the dividend to 9 and continue with: 93 / 21

Going ahead to step 2:
The number 21 fits into 93 4 times, leaving a remainder of 9.
The next digit of our result is 4. 
Result so far: 4.0
If we subtract 84 from 93, we get 9.
Take the next digit (9) from the dividend and append it to 9, then repeat: 99 / 21

Advancing to step 3:
If we divide 99 by 21, we get 4 and a remainder of 15.
Put 4 as the next digit of the answer. 
Result so far: 44.0
The remainder is 15 after subtracting 84 from 99.
Take the next digit (5) from the dividend and append it to 15, then repeat: 155 / 21

Moving on to step 4:
The number 21 fits into 155 7 times, leaving a remainder of 8.
The next digit of our result is 7. 
Result so far: 447.0
Subtract 147 from 155 to get 8.
Include the next digit (6) from the dividend after 8, then repeat: 86 / 21

Moving on to step 5:
21 goes into 86 4 times with a remainder of 2.
Use 4 as the next digit of our solution. 
Result so far: 4474.0
Subtracting 84 from 86 leaves us with 2.
Include the next digit (9) from the dividend after 2, then repeat: 29 / 21

Moving on to step 6:
29 divided by 21 is 1 with a remainder of 8.
Write down 1 as next digit of the result. 
Result so far: 44741.0
Deduct 21 from 29 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 7:
80 divided by 21 is 3 with a remainder of 17.
Put 3 as the next digit of the answer. 
Result so far: 44741.3
Subtracting 63 from 80 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Moving on to step 8:
The number 21 fits into 170 8 times, leaving a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 44741.38
Subtract 168 from 170 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 9:
20 divided by 21 is 0 with a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 44741.38
Deduct 0 from 20 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 10:
The number 21 fits into 200 9 times, leaving a remainder of 11.
Put 9 as the next digit of the answer. 
Result so far: 44741.3809
If we subtract 189 from 200, we get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 11:
21 goes into 110 5 times with a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 44741.38095
The remainder is 5 after subtracting 105 from 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 12:
If we divide 50 by 21, we get 2 and a remainder of 8.
Put 2 as the next digit of the answer. 
Result so far: 44741.380952
If we take 42 away from 50, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 13:
21 can be fit into 80 3 times, resulting in a remainder of 17.
Put 3 as the next digit of the answer. 
Result so far: 44741.3809523
If we subtract 63 from 80, we get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Advancing to step 14:
170 divided by 21 is 8 with a remainder of 2.
Record the quotient 8 as the next digit in the result. 
Result so far: 44741.38095238
Deduct 168 from 170 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

The quotient of the division is 44741.38095238, and the remainder is 2e-09.