19999305 ÷ 813 
We're looking to find how many times 813 goes into 19999305.

Step 1:
When dividing 1 by 813, we get 0 with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Bring next digit (9) of the dividend behind the 1 and repeat the process: 19 / 813

On to step 2:
813 can be fit into 19 0 times, resulting in a remainder of 19.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 19, we end up with 19.
Fetch the next digit (9) from the dividend, attach it to 19 and continue: 199 / 813

Moving on to step 3:
199 divided by 813 is 0 with a remainder of 199.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 199 leaves us with 199.
Append the next digit (9) from the dividend to 199 and continue with: 1999 / 813

On to step 4:
When dividing 1999 by 813, we get 2 with a remainder of 373.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
The remainder is 373 after subtracting 1626 from 1999.
Bring next digit (9) of the dividend behind the 373 and repeat the process: 3739 / 813

On to step 5:
813 goes into 3739 4 times with a remainder of 487.
Use 4 as the next digit of our solution. 
Result so far: 24.0
Deduct 3252 from 3739 and we're left with 487.
Include the next digit (3) from the dividend after 487, then repeat: 4873 / 813

Going ahead to step 6:
If we divide 4873 by 813, we get 5 and a remainder of 808.
Record the quotient 5 as the next digit in the result. 
Result so far: 245.0
The remainder is 808 after subtracting 4065 from 4873.
Fetch the next digit (0) from the dividend, attach it to 808 and continue: 8080 / 813

Advancing to step 7:
If we divide 8080 by 813, we get 9 and a remainder of 763.
Use 9 as the next digit of our solution. 
Result so far: 2459.0
Deduct 7317 from 8080 and we're left with 763.
Fetch the next digit (5) from the dividend, attach it to 763 and continue: 7635 / 813

Let's proceed to step 8:
7635 divided by 813 is 9 with a remainder of 318.
Write down 9 as next digit of the result. 
Result so far: 24599.0
Subtracting 7317 from 7635 leaves us with 318.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3180, and continue the process.

Moving on to step 9:
813 goes into 3180 3 times with a remainder of 741.
Record the quotient 3 as the next digit in the result. 
Result so far: 24599.3
If we take 2439 away from 3180, we end up with 741.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7410, and continue the process.

Advancing to step 10:
If we divide 7410 by 813, we get 9 and a remainder of 93.
The next digit of our result is 9. 
Result so far: 24599.39
If we subtract 7317 from 7410, we get 93.
Since there are no more digits in the dividend, we add a zero to the remainder making it 930, and continue the process.

Let's proceed to step 11:
The number 813 fits into 930 1 times, leaving a remainder of 117.
Record the quotient 1 as the next digit in the result. 
Result so far: 24599.391
Subtract 813 from 930 to get 117.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1170, and continue the process.

On to step 12:
The number 813 fits into 1170 1 times, leaving a remainder of 357.
Record the quotient 1 as the next digit in the result. 
Result so far: 24599.3911
The remainder is 357 after subtracting 813 from 1170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3570, and continue the process.

The final result is 24599.3911 with a remainder of 0.00357.