21636385 ÷ 808 
We want to figure out the number of times 21636385 can be divided by 808.

Going ahead to step 1:
2 divided by 808 is 0 with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 808

Going ahead to step 2:
The number 808 fits into 21 0 times, leaving a remainder of 21.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 21 and we're left with 21.
Fetch the next digit (6) from the dividend, attach it to 21 and continue: 216 / 808

On to step 3:
If we divide 216 by 808, we get 0 and a remainder of 216.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 216 to get 216.
Append the next digit (3) from the dividend to 216 and continue with: 2163 / 808

Advancing to step 4:
When dividing 2163 by 808, we get 2 with a remainder of 547.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtracting 1616 from 2163 leaves us with 547.
Append the next digit (6) from the dividend to 547 and continue with: 5476 / 808

Going ahead to step 5:
808 can be fit into 5476 6 times, resulting in a remainder of 628.
Record the quotient 6 as the next digit in the result. 
Result so far: 26.0
Subtract 4848 from 5476 to get 628.
Take the next digit (3) from the dividend and append it to 628, then repeat: 6283 / 808

On to step 6:
The number 808 fits into 6283 7 times, leaving a remainder of 627.
Put 7 as the next digit of the answer. 
Result so far: 267.0
Subtracting 5656 from 6283 leaves us with 627.
Grab the next digit (8) from the dividend, add it to 627, then carry on: 6278 / 808

Going ahead to step 7:
808 can be fit into 6278 7 times, resulting in a remainder of 622.
The next digit of our result is 7. 
Result so far: 2677.0
The remainder is 622 after subtracting 5656 from 6278.
Include the next digit (5) from the dividend after 622, then repeat: 6225 / 808

Advancing to step 8:
If we divide 6225 by 808, we get 7 and a remainder of 569.
The next digit of our result is 7. 
Result so far: 26777.0
If we subtract 5656 from 6225, we get 569.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5690, and continue the process.

Moving on to step 9:
5690 divided by 808 is 7 with a remainder of 34.
The number 7 becomes the next digit in our result. 
Result so far: 26777.7
The remainder is 34 after subtracting 5656 from 5690.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

On to step 10:
The number 808 fits into 340 0 times, leaving a remainder of 340.
The number 0 becomes the next digit in our result. 
Result so far: 26777.7
Subtract 0 from 340 to get 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

On to step 11:
808 goes into 3400 4 times with a remainder of 168.
Write down 4 as next digit of the result. 
Result so far: 26777.704
The remainder is 168 after subtracting 3232 from 3400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1680, and continue the process.

On to step 12:
When dividing 1680 by 808, we get 2 with a remainder of 64.
Record the quotient 2 as the next digit in the result. 
Result so far: 26777.7042
If we take 1616 away from 1680, we end up with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Moving on to step 13:
The number 808 fits into 640 0 times, leaving a remainder of 640.
The number 0 becomes the next digit in our result. 
Result so far: 26777.7042
The remainder is 640 after subtracting 0 from 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6400, and continue the process.

On to step 14:
If we divide 6400 by 808, we get 7 and a remainder of 744.
The next digit of our result is 7. 
Result so far: 26777.704207
Subtracting 5656 from 6400 leaves us with 744.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7440, and continue the process.

Let's proceed to step 15:
808 goes into 7440 9 times with a remainder of 168.
Record the quotient 9 as the next digit in the result. 
Result so far: 26777.7042079
If we subtract 7272 from 7440, we get 168.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1680, and continue the process.

Advancing to step 16:
808 goes into 1680 2 times with a remainder of 64.
Put 2 as the next digit of the answer. 
Result so far: 26777.70420792
Subtracting 1616 from 1680 leaves us with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

After the division, we end up with 26777.70420792 and a remainder of 6.4e-08.