21383516 ÷ 809 
We want to figure out the number of times 21383516 can be divided by 809.

Going ahead to step 1:
The number 809 fits into 2 0 times, leaving a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 809

On to step 2:
809 goes into 21 0 times with a remainder of 21.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 21 to get 21.
Take the next digit (3) from the dividend and append it to 21, then repeat: 213 / 809

Step 3:
The number 809 fits into 213 0 times, leaving a remainder of 213.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 213 and we're left with 213.
Bring next digit (8) of the dividend behind the 213 and repeat the process: 2138 / 809

Let's proceed to step 4:
If we divide 2138 by 809, we get 2 and a remainder of 520.
The next digit of our result is 2. 
Result so far: 2.0
The remainder is 520 after subtracting 1618 from 2138.
Bring next digit (3) of the dividend behind the 520 and repeat the process: 5203 / 809

Step 5:
If we divide 5203 by 809, we get 6 and a remainder of 349.
Write down 6 as next digit of the result. 
Result so far: 26.0
Deduct 4854 from 5203 and we're left with 349.
Fetch the next digit (5) from the dividend, attach it to 349 and continue: 3495 / 809

Step 6:
The number 809 fits into 3495 4 times, leaving a remainder of 259.
The number 4 becomes the next digit in our result. 
Result so far: 264.0
If we take 3236 away from 3495, we end up with 259.
Take the next digit (1) from the dividend and append it to 259, then repeat: 2591 / 809

Let's proceed to step 7:
809 goes into 2591 3 times with a remainder of 164.
Use 3 as the next digit of our solution. 
Result so far: 2643.0
Subtract 2427 from 2591 to get 164.
Append the next digit (6) from the dividend to 164 and continue with: 1646 / 809

Step 8:
1646 divided by 809 is 2 with a remainder of 28.
Use 2 as the next digit of our solution. 
Result so far: 26432.0
Subtracting 1618 from 1646 leaves us with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Moving on to step 9:
809 can be fit into 280 0 times, resulting in a remainder of 280.
The number 0 becomes the next digit in our result. 
Result so far: 26432.0
Subtracting 0 from 280 leaves us with 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

On to step 10:
If we divide 2800 by 809, we get 3 and a remainder of 373.
The next digit of our result is 3. 
Result so far: 26432.03
Subtract 2427 from 2800 to get 373.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3730, and continue the process.

Moving on to step 11:
If we divide 3730 by 809, we get 4 and a remainder of 494.
Write down 4 as next digit of the result. 
Result so far: 26432.034
Deduct 3236 from 3730 and we're left with 494.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4940, and continue the process.

On to step 12:
If we divide 4940 by 809, we get 6 and a remainder of 86.
Record the quotient 6 as the next digit in the result. 
Result so far: 26432.0346
If we take 4854 away from 4940, we end up with 86.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

Step 13:
860 divided by 809 is 1 with a remainder of 51.
The number 1 becomes the next digit in our result. 
Result so far: 26432.03461
The remainder is 51 after subtracting 809 from 860.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Let's proceed to step 14:
809 goes into 510 0 times with a remainder of 510.
Record the quotient 0 as the next digit in the result. 
Result so far: 26432.03461
If we subtract 0 from 510, we get 510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5100, and continue the process.

Moving on to step 15:
809 can be fit into 5100 6 times, resulting in a remainder of 246.
Put 6 as the next digit of the answer. 
Result so far: 26432.0346106
The remainder is 246 after subtracting 4854 from 5100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2460, and continue the process.

Let's proceed to step 16:
809 goes into 2460 3 times with a remainder of 33.
Write down 3 as next digit of the result. 
Result so far: 26432.03461063
If we subtract 2427 from 2460, we get 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

In conclusion, the division gives 26432.03461063 with a balance of 3.3e-08.