615563 ÷ 21 
We want to divide 615563 by 21.

Advancing to step 1:
If we divide 6 by 21, we get 0 and a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Take the next digit (1) from the dividend and append it to 6, then repeat: 61 / 21

Let's proceed to step 2:
If we divide 61 by 21, we get 2 and a remainder of 19.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Deduct 42 from 61 and we're left with 19.
Take the next digit (5) from the dividend and append it to 19, then repeat: 195 / 21

Step 3:
21 goes into 195 9 times with a remainder of 6.
The next digit of our result is 9. 
Result so far: 29.0
Subtract 189 from 195 to get 6.
Append the next digit (5) from the dividend to 6 and continue with: 65 / 21

Step 4:
21 goes into 65 3 times with a remainder of 2.
The number 3 becomes the next digit in our result. 
Result so far: 293.0
If we take 63 away from 65, we end up with 2.
Fetch the next digit (6) from the dividend, attach it to 2 and continue: 26 / 21

Let's proceed to step 5:
26 divided by 21 is 1 with a remainder of 5.
Record the quotient 1 as the next digit in the result. 
Result so far: 2931.0
If we subtract 21 from 26, we get 5.
Fetch the next digit (3) from the dividend, attach it to 5 and continue: 53 / 21

Step 6:
When dividing 53 by 21, we get 2 with a remainder of 11.
Record the quotient 2 as the next digit in the result. 
Result so far: 29312.0
Subtracting 42 from 53 leaves us with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Moving on to step 7:
When dividing 110 by 21, we get 5 with a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 29312.5
If we subtract 105 from 110, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 8:
The number 21 fits into 50 2 times, leaving a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 29312.52
If we subtract 42 from 50, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 9:
When dividing 80 by 21, we get 3 with a remainder of 17.
Put 3 as the next digit of the answer. 
Result so far: 29312.523
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.

Let's proceed to step 10:
When dividing 170 by 21, we get 8 with a remainder of 2.
Use 8 as the next digit of our solution. 
Result so far: 29312.5238
If we subtract 168 from 170, we 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.

Moving on to step 11:
21 can be fit into 20 0 times, resulting in a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 29312.5238
If we subtract 0 from 20, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 12:
The number 21 fits into 200 9 times, leaving a remainder of 11.
The number 9 becomes the next digit in our result. 
Result so far: 29312.523809
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 13:
If we divide 110 by 21, we get 5 and a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 29312.5238095
If we take 105 away from 110, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 14:
If we divide 50 by 21, we get 2 and a remainder of 8.
Use 2 as the next digit of our solution. 
Result so far: 29312.52380952
The remainder is 8 after subtracting 42 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The final result is 29312.52380952 with a remainder of 8e-09.