939691 divided by 21 
We're looking to find how many times 21 goes into 939691.

On to step 1:
The number 21 fits into 9 0 times, leaving a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Take the next digit (3) from the dividend and append it to 9, then repeat: 93 / 21

Let's proceed to step 2:
The number 21 fits into 93 4 times, leaving a remainder of 9.
Use 4 as the next digit of our solution. 
Result so far: 4.0
The remainder is 9 after subtracting 84 from 93.
Append the next digit (9) from the dividend to 9 and continue with: 99 / 21

Advancing to step 3:
When dividing 99 by 21, we get 4 with a remainder of 15.
Use 4 as the next digit of our solution. 
Result so far: 44.0
Subtract 84 from 99 to get 15.
Fetch the next digit (6) from the dividend, attach it to 15 and continue: 156 / 21

On to step 4:
21 can be fit into 156 7 times, resulting in a remainder of 9.
The next digit of our result is 7. 
Result so far: 447.0
If we subtract 147 from 156, we get 9.
Fetch the next digit (9) from the dividend, attach it to 9 and continue: 99 / 21

Advancing to step 5:
The number 21 fits into 99 4 times, leaving a remainder of 15.
Use 4 as the next digit of our solution. 
Result so far: 4474.0
Subtracting 84 from 99 leaves us with 15.
Append the next digit (1) from the dividend to 15 and continue with: 151 / 21

On to step 6:
21 goes into 151 7 times with a remainder of 4.
The next digit of our result is 7. 
Result so far: 44747.0
If we subtract 147 from 151, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 7:
21 goes into 40 1 times with a remainder of 19.
The number 1 becomes the next digit in our result. 
Result so far: 44747.1
If we take 21 away from 40, we end up with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Moving on to step 8:
21 goes into 190 9 times with a remainder of 1.
Use 9 as the next digit of our solution. 
Result so far: 44747.19
Deduct 189 from 190 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 9:
When dividing 10 by 21, we get 0 with a remainder of 10.
The next digit of our result is 0. 
Result so far: 44747.19
Subtract 0 from 10 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 10:
When dividing 100 by 21, we get 4 with a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 44747.1904
If we subtract 84 from 100, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 11:
If we divide 160 by 21, we get 7 and a remainder of 13.
Record the quotient 7 as the next digit in the result. 
Result so far: 44747.19047
If we take 147 away from 160, we end up with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Going ahead to step 12:
When dividing 130 by 21, we get 6 with a remainder of 4.
Use 6 as the next digit of our solution. 
Result so far: 44747.190476
If we subtract 126 from 130, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 13:
21 goes into 40 1 times with a remainder of 19.
The next digit of our result is 1. 
Result so far: 44747.1904761
If we take 21 away from 40, we end up with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Advancing to step 14:
When dividing 190 by 21, we get 9 with a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 44747.19047619
If we subtract 189 from 190, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

After the division, we end up with 44747.19047619 and a remainder of 1e-09.