64317993 ÷ 815 
Let's see how many times 815 fits into 64317993.

Going ahead to step 1:
6 divided by 815 is 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Append the next digit (4) from the dividend to 6 and continue with: 64 / 815

Let's proceed to step 2:
64 divided by 815 is 0 with a remainder of 64.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 64, we end up with 64.
Include the next digit (3) from the dividend after 64, then repeat: 643 / 815

Going ahead to step 3:
If we divide 643 by 815, we get 0 and a remainder of 643.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 643 and we're left with 643.
Bring next digit (1) of the dividend behind the 643 and repeat the process: 6431 / 815

Advancing to step 4:
6431 divided by 815 is 7 with a remainder of 726.
Write down 7 as next digit of the result. 
Result so far: 7.0
If we take 5705 away from 6431, we end up with 726.
Take the next digit (7) from the dividend and append it to 726, then repeat: 7267 / 815

Going ahead to step 5:
The number 815 fits into 7267 8 times, leaving a remainder of 747.
Use 8 as the next digit of our solution. 
Result so far: 78.0
Subtracting 6520 from 7267 leaves us with 747.
Grab the next digit (9) from the dividend, add it to 747, then carry on: 7479 / 815

Let's proceed to step 6:
The number 815 fits into 7479 9 times, leaving a remainder of 144.
Use 9 as the next digit of our solution. 
Result so far: 789.0
Subtracting 7335 from 7479 leaves us with 144.
Take the next digit (9) from the dividend and append it to 144, then repeat: 1449 / 815

On to step 7:
1449 divided by 815 is 1 with a remainder of 634.
The next digit of our result is 1. 
Result so far: 7891.0
Subtracting 815 from 1449 leaves us with 634.
Include the next digit (3) from the dividend after 634, then repeat: 6343 / 815

Moving on to step 8:
When dividing 6343 by 815, we get 7 with a remainder of 638.
The number 7 becomes the next digit in our result. 
Result so far: 78917.0
Subtracting 5705 from 6343 leaves us with 638.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6380, and continue the process.

Moving on to step 9:
6380 divided by 815 is 7 with a remainder of 675.
The number 7 becomes the next digit in our result. 
Result so far: 78917.7
If we subtract 5705 from 6380, we get 675.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6750, and continue the process.

Advancing to step 10:
If we divide 6750 by 815, we get 8 and a remainder of 230.
Write down 8 as next digit of the result. 
Result so far: 78917.78
If we take 6520 away from 6750, we end up with 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2300, and continue the process.

On to step 11:
When dividing 2300 by 815, we get 2 with a remainder of 670.
Record the quotient 2 as the next digit in the result. 
Result so far: 78917.782
The remainder is 670 after subtracting 1630 from 2300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6700, and continue the process.

Let's proceed to step 12:
The number 815 fits into 6700 8 times, leaving a remainder of 180.
Put 8 as the next digit of the answer. 
Result so far: 78917.7828
If we take 6520 away from 6700, we end up with 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

Step 13:
815 can be fit into 1800 2 times, resulting in a remainder of 170.
The next digit of our result is 2. 
Result so far: 78917.78282
If we subtract 1630 from 1800, we get 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Going ahead to step 14:
815 goes into 1700 2 times with a remainder of 70.
Write down 2 as next digit of the result. 
Result so far: 78917.782822
Deduct 1630 from 1700 and we're left with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

In conclusion, the division gives 78917.782822 with a balance of 7e-06.