We're dividing 21308814 by 857 
We want to divide 21308814 by 857.

Step 1:
857 can be fit into 2 0 times, resulting in a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 857

Moving on to step 2:
21 divided by 857 is 0 with a remainder of 21.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 21, we get 21.
Include the next digit (3) from the dividend after 21, then repeat: 213 / 857

Moving on to step 3:
When dividing 213 by 857, we get 0 with a remainder of 213.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 213 and we're left with 213.
Grab the next digit (0) from the dividend, add it to 213, then carry on: 2130 / 857

Moving on to step 4:
If we divide 2130 by 857, we get 2 and a remainder of 416.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we take 1714 away from 2130, we end up with 416.
Fetch the next digit (8) from the dividend, attach it to 416 and continue: 4168 / 857

Going ahead to step 5:
857 goes into 4168 4 times with a remainder of 740.
The next digit of our result is 4. 
Result so far: 24.0
If we take 3428 away from 4168, we end up with 740.
Append the next digit (8) from the dividend to 740 and continue with: 7408 / 857

Step 6:
7408 divided by 857 is 8 with a remainder of 552.
Use 8 as the next digit of our solution. 
Result so far: 248.0
The remainder is 552 after subtracting 6856 from 7408.
Bring next digit (1) of the dividend behind the 552 and repeat the process: 5521 / 857

On to step 7:
The number 857 fits into 5521 6 times, leaving a remainder of 379.
The number 6 becomes the next digit in our result. 
Result so far: 2486.0
If we take 5142 away from 5521, we end up with 379.
Include the next digit (4) from the dividend after 379, then repeat: 3794 / 857

Advancing to step 8:
The number 857 fits into 3794 4 times, leaving a remainder of 366.
The number 4 becomes the next digit in our result. 
Result so far: 24864.0
If we subtract 3428 from 3794, we get 366.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3660, and continue the process.

Advancing to step 9:
857 goes into 3660 4 times with a remainder of 232.
Write down 4 as next digit of the result. 
Result so far: 24864.4
Subtract 3428 from 3660 to get 232.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2320, and continue the process.

Let's proceed to step 10:
The number 857 fits into 2320 2 times, leaving a remainder of 606.
Put 2 as the next digit of the answer. 
Result so far: 24864.42
Subtract 1714 from 2320 to get 606.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6060, and continue the process.

Step 11:
If we divide 6060 by 857, we get 7 and a remainder of 61.
Write down 7 as next digit of the result. 
Result so far: 24864.427
Subtract 5999 from 6060 to get 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Step 12:
610 divided by 857 is 0 with a remainder of 610.
Record the quotient 0 as the next digit in the result. 
Result so far: 24864.427
If we subtract 0 from 610, we get 610.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6100, and continue the process.

On to step 13:
The number 857 fits into 6100 7 times, leaving a remainder of 101.
Record the quotient 7 as the next digit in the result. 
Result so far: 24864.42707
If we take 5999 away from 6100, we end up with 101.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1010, and continue the process.

Moving on to step 14:
The number 857 fits into 1010 1 times, leaving a remainder of 153.
Write down 1 as next digit of the result. 
Result so far: 24864.427071
If we take 857 away from 1010, we end up with 153.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1530, and continue the process.

Step 15:
857 goes into 1530 1 times with a remainder of 673.
Put 1 as the next digit of the answer. 
Result so far: 24864.4270711
Deduct 857 from 1530 and we're left with 673.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6730, and continue the process.

The quotient of the division is 24864.4270711, and the remainder is 6.73e-06.