We divide 13565287 by 21
We're looking to find how many times 21 goes into 13565287.

Step 1:
21 can be fit into 1 0 times, resulting in a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Fetch the next digit (3) from the dividend, attach it to 1 and continue: 13 / 21

Going ahead to step 2:
The number 21 fits into 13 0 times, leaving a remainder of 13.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 13 and we're left with 13.
Take the next digit (5) from the dividend and append it to 13, then repeat: 135 / 21

Let's proceed to step 3:
21 goes into 135 6 times with a remainder of 9.
Use 6 as the next digit of our solution. 
Result so far: 6.0
Subtract 126 from 135 to get 9.
Fetch the next digit (6) from the dividend, attach it to 9 and continue: 96 / 21

Going ahead to step 4:
21 goes into 96 4 times with a remainder of 12.
The number 4 becomes the next digit in our result. 
Result so far: 64.0
If we subtract 84 from 96, we get 12.
Append the next digit (5) from the dividend to 12 and continue with: 125 / 21

Moving on to step 5:
The number 21 fits into 125 5 times, leaving a remainder of 20.
Write down 5 as next digit of the result. 
Result so far: 645.0
Subtract 105 from 125 to get 20.
Take the next digit (2) from the dividend and append it to 20, then repeat: 202 / 21

On to step 6:
The number 21 fits into 202 9 times, leaving a remainder of 13.
The next digit of our result is 9. 
Result so far: 6459.0
If we take 189 away from 202, we end up with 13.
Grab the next digit (8) from the dividend, add it to 13, then carry on: 138 / 21

Step 7:
If we divide 138 by 21, we get 6 and a remainder of 12.
The number 6 becomes the next digit in our result. 
Result so far: 64596.0
If we subtract 126 from 138, we get 12.
Fetch the next digit (7) from the dividend, attach it to 12 and continue: 127 / 21

Let's proceed to step 8:
The number 21 fits into 127 6 times, leaving a remainder of 1.
Put 6 as the next digit of the answer. 
Result so far: 645966.0
The remainder is 1 after subtracting 126 from 127.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 9:
If we divide 10 by 21, we get 0 and a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 645966.0
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.

Advancing to step 10:
The number 21 fits into 100 4 times, leaving a remainder of 16.
The next digit of our result is 4. 
Result so far: 645966.04
The remainder is 16 after subtracting 84 from 100.
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:
The number 21 fits into 160 7 times, leaving a remainder of 13.
The number 7 becomes the next digit in our result. 
Result so far: 645966.047
Subtract 147 from 160 to 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.

Advancing to step 12:
21 can be fit into 130 6 times, resulting in a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 645966.0476
If we take 126 away from 130, we end up 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.

On to step 13:
If we divide 40 by 21, we get 1 and a remainder of 19.
Write down 1 as next digit of the result. 
Result so far: 645966.04761
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:
21 can be fit into 190 9 times, resulting in a remainder of 1.
Record the quotient 9 as the next digit in the result. 
Result so far: 645966.047619
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.

On to step 15:
21 goes into 10 0 times with a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 645966.047619
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.

Moving on to step 16:
21 goes into 100 4 times with a remainder of 16.
Put 4 as the next digit of the answer. 
Result so far: 645966.04761904
Deduct 84 from 100 and we're left 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.

In conclusion, the division gives 645966.04761904 with a balance of 1.6e-08.