We divide 21093462 by 813
Our goal is to divide 21093462 by 813.

Moving on to step 1:
When dividing 2 by 813, we get 0 with a remainder of 2.
The number 0 becomes the next digit in our result. 
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 / 813

Moving on to step 2:
813 can be fit into 21 0 times, resulting in a remainder of 21.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 21, we get 21.
Bring next digit (0) of the dividend behind the 21 and repeat the process: 210 / 813

Advancing to step 3:
813 can be fit into 210 0 times, resulting in a remainder of 210.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 210 to get 210.
Bring next digit (9) of the dividend behind the 210 and repeat the process: 2109 / 813

Going ahead to step 4:
813 goes into 2109 2 times with a remainder of 483.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we subtract 1626 from 2109, we get 483.
Take the next digit (3) from the dividend and append it to 483, then repeat: 4833 / 813

Step 5:
When dividing 4833 by 813, we get 5 with a remainder of 768.
Record the quotient 5 as the next digit in the result. 
Result so far: 25.0
Subtracting 4065 from 4833 leaves us with 768.
Fetch the next digit (4) from the dividend, attach it to 768 and continue: 7684 / 813

Moving on to step 6:
The number 813 fits into 7684 9 times, leaving a remainder of 367.
Put 9 as the next digit of the answer. 
Result so far: 259.0
Deduct 7317 from 7684 and we're left with 367.
Include the next digit (6) from the dividend after 367, then repeat: 3676 / 813

Step 7:
When dividing 3676 by 813, we get 4 with a remainder of 424.
The next digit of our result is 4. 
Result so far: 2594.0
Subtracting 3252 from 3676 leaves us with 424.
Fetch the next digit (2) from the dividend, attach it to 424 and continue: 4242 / 813

On to step 8:
The number 813 fits into 4242 5 times, leaving a remainder of 177.
Record the quotient 5 as the next digit in the result. 
Result so far: 25945.0
Subtracting 4065 from 4242 leaves us with 177.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1770, and continue the process.

Let's proceed to step 9:
813 goes into 1770 2 times with a remainder of 144.
The number 2 becomes the next digit in our result. 
Result so far: 25945.2
If we subtract 1626 from 1770, we get 144.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1440, and continue the process.

Advancing to step 10:
813 goes into 1440 1 times with a remainder of 627.
Put 1 as the next digit of the answer. 
Result so far: 25945.21
Subtract 813 from 1440 to get 627.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6270, and continue the process.

Advancing to step 11:
When dividing 6270 by 813, we get 7 with a remainder of 579.
Use 7 as the next digit of our solution. 
Result so far: 25945.217
Subtract 5691 from 6270 to get 579.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5790, and continue the process.

Step 12:
When dividing 5790 by 813, we get 7 with a remainder of 99.
Record the quotient 7 as the next digit in the result. 
Result so far: 25945.2177
If we subtract 5691 from 5790, we get 99.
Since there are no more digits in the dividend, we add a zero to the remainder making it 990, and continue the process.

The final result is 25945.2177 with a remainder of 0.00099.