612565 divided by 21 
We want to divide 612565 by 21.

On to step 1:
21 goes into 6 0 times with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Append the next digit (1) from the dividend to 6 and continue with: 61 / 21

Advancing to step 2:
When dividing 61 by 21, we get 2 with a remainder of 19.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we subtract 42 from 61, we get 19.
Bring next digit (2) of the dividend behind the 19 and repeat the process: 192 / 21

Let's proceed to step 3:
The number 21 fits into 192 9 times, leaving a remainder of 3.
Record the quotient 9 as the next digit in the result. 
Result so far: 29.0
Subtract 189 from 192 to get 3.
Include the next digit (5) from the dividend after 3, then repeat: 35 / 21

On to step 4:
If we divide 35 by 21, we get 1 and a remainder of 14.
The number 1 becomes the next digit in our result. 
Result so far: 291.0
Deduct 21 from 35 and we're left with 14.
Grab the next digit (6) from the dividend, add it to 14, then carry on: 146 / 21

Step 5:
21 can be fit into 146 6 times, resulting in a remainder of 20.
The number 6 becomes the next digit in our result. 
Result so far: 2916.0
If we subtract 126 from 146, we get 20.
Take the next digit (5) from the dividend and append it to 20, then repeat: 205 / 21

On to step 6:
21 goes into 205 9 times with a remainder of 16.
Write down 9 as next digit of the result. 
Result so far: 29169.0
If we subtract 189 from 205, 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.

Step 7:
21 can be fit into 160 7 times, resulting in a remainder of 13.
Record the quotient 7 as the next digit in the result. 
Result so far: 29169.7
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.

Let's proceed to step 8:
130 divided by 21 is 6 with a remainder of 4.
The next digit of our result is 6. 
Result so far: 29169.76
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.

Going ahead to step 9:
The number 21 fits into 40 1 times, leaving a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 29169.761
If we subtract 21 from 40, we get 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:
21 can be fit into 190 9 times, resulting in a remainder of 1.
The next digit of our result is 9. 
Result so far: 29169.7619
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.

On 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: 29169.7619
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 12:
21 goes into 100 4 times with a remainder of 16.
Put 4 as the next digit of the answer. 
Result so far: 29169.761904
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.

Moving on to step 13:
21 goes into 160 7 times with a remainder of 13.
Use 7 as the next digit of our solution. 
Result so far: 29169.7619047
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.

Step 14:
The number 21 fits into 130 6 times, leaving a remainder of 4.
The next digit of our result is 6. 
Result so far: 29169.76190476
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.

Our division results in 29169.76190476 with a remaining 4e-09.