We divide 591607 by 21
We want to divide 591607 by 21.

Moving on to step 1:
When dividing 5 by 21, we get 0 with a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Grab the next digit (9) from the dividend, add it to 5, then carry on: 59 / 21

Step 2:
21 can be fit into 59 2 times, resulting in a remainder of 17.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we take 42 away from 59, we end up with 17.
Take the next digit (1) from the dividend and append it to 17, then repeat: 171 / 21

Step 3:
The number 21 fits into 171 8 times, leaving a remainder of 3.
The number 8 becomes the next digit in our result. 
Result so far: 28.0
If we subtract 168 from 171, we get 3.
Fetch the next digit (6) from the dividend, attach it to 3 and continue: 36 / 21

Moving on to step 4:
36 divided by 21 is 1 with a remainder of 15.
The number 1 becomes the next digit in our result. 
Result so far: 281.0
The remainder is 15 after subtracting 21 from 36.
Grab the next digit (0) from the dividend, add it to 15, then carry on: 150 / 21

Moving on to step 5:
When dividing 150 by 21, we get 7 with a remainder of 3.
Put 7 as the next digit of the answer. 
Result so far: 2817.0
If we subtract 147 from 150, we get 3.
Take the next digit (7) from the dividend and append it to 3, then repeat: 37 / 21

On to step 6:
If we divide 37 by 21, we get 1 and a remainder of 16.
The number 1 becomes the next digit in our result. 
Result so far: 28171.0
If we take 21 away from 37, we end up with 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 7:
21 goes into 160 7 times with a remainder of 13.
The next digit of our result is 7. 
Result so far: 28171.7
If we subtract 147 from 160, we get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

On to step 8:
21 goes into 130 6 times with a remainder of 4.
The next digit of our result is 6. 
Result so far: 28171.76
The remainder is 4 after subtracting 126 from 130.
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 9:
21 can be fit into 40 1 times, resulting in a remainder of 19.
The number 1 becomes the next digit in our result. 
Result so far: 28171.761
Subtracting 21 from 40 leaves us 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.

Step 10:
The number 21 fits into 190 9 times, leaving a remainder of 1.
Record the quotient 9 as the next digit in the result. 
Result so far: 28171.7619
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.

Advancing to step 11:
If we divide 10 by 21, we get 0 and a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 28171.7619
If we take 0 away from 10, we end up with 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 12:
If we divide 100 by 21, we get 4 and a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 28171.761904
If we take 84 away from 100, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 13:
When dividing 160 by 21, we get 7 with a remainder of 13.
Record the quotient 7 as the next digit in the result. 
Result so far: 28171.7619047
The remainder is 13 after subtracting 147 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Advancing to step 14:
The number 21 fits into 130 6 times, leaving a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 28171.76190476
Subtracting 126 from 130 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

After the division, we end up with 28171.76190476 and a remainder of 4e-09.