We look at the division of 78000815 by 571 
Let's see how many times 571 fits into 78000815.

Moving on to step 1:
571 can be fit into 7 0 times, resulting in a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Append the next digit (8) from the dividend to 7 and continue with: 78 / 571

On to step 2:
78 divided by 571 is 0 with a remainder of 78.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 78, we end up with 78.
Bring next digit (0) of the dividend behind the 78 and repeat the process: 780 / 571

Moving on to step 3:
The number 571 fits into 780 1 times, leaving a remainder of 209.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 571 from 780 and we're left with 209.
Bring next digit (0) of the dividend behind the 209 and repeat the process: 2090 / 571

Going ahead to step 4:
2090 divided by 571 is 3 with a remainder of 377.
The next digit of our result is 3. 
Result so far: 13.0
The remainder is 377 after subtracting 1713 from 2090.
Bring next digit (0) of the dividend behind the 377 and repeat the process: 3770 / 571

Step 5:
3770 divided by 571 is 6 with a remainder of 344.
The number 6 becomes the next digit in our result. 
Result so far: 136.0
Deduct 3426 from 3770 and we're left with 344.
Include the next digit (8) from the dividend after 344, then repeat: 3448 / 571

Step 6:
571 goes into 3448 6 times with a remainder of 22.
The number 6 becomes the next digit in our result. 
Result so far: 1366.0
If we subtract 3426 from 3448, we get 22.
Include the next digit (1) from the dividend after 22, then repeat: 221 / 571

Let's proceed to step 7:
The number 571 fits into 221 0 times, leaving a remainder of 221.
The number 0 becomes the next digit in our result. 
Result so far: 13660.0
Deduct 0 from 221 and we're left with 221.
Grab the next digit (5) from the dividend, add it to 221, then carry on: 2215 / 571

On to step 8:
If we divide 2215 by 571, we get 3 and a remainder of 502.
The next digit of our result is 3. 
Result so far: 136603.0
Subtracting 1713 from 2215 leaves us with 502.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5020, and continue the process.

Going ahead to step 9:
5020 divided by 571 is 8 with a remainder of 452.
Put 8 as the next digit of the answer. 
Result so far: 136603.8
Deduct 4568 from 5020 and we're left with 452.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4520, and continue the process.

On to step 10:
The number 571 fits into 4520 7 times, leaving a remainder of 523.
The number 7 becomes the next digit in our result. 
Result so far: 136603.87
If we take 3997 away from 4520, we end up with 523.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5230, and continue the process.

Let's proceed to step 11:
When dividing 5230 by 571, we get 9 with a remainder of 91.
The next digit of our result is 9. 
Result so far: 136603.879
If we subtract 5139 from 5230, we get 91.
Since there are no more digits in the dividend, we add a zero to the remainder making it 910, and continue the process.

Advancing to step 12:
If we divide 910 by 571, we get 1 and a remainder of 339.
Use 1 as the next digit of our solution. 
Result so far: 136603.8791
Deduct 571 from 910 and we're left with 339.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3390, and continue the process.

Let's proceed to step 13:
When dividing 3390 by 571, we get 5 with a remainder of 535.
The next digit of our result is 5. 
Result so far: 136603.87915
The remainder is 535 after subtracting 2855 from 3390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5350, and continue the process.

Let's proceed to step 14:
571 can be fit into 5350 9 times, resulting in a remainder of 211.
Use 9 as the next digit of our solution. 
Result so far: 136603.879159
The remainder is 211 after subtracting 5139 from 5350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2110, and continue the process.

Let's proceed to step 15:
When dividing 2110 by 571, we get 3 with a remainder of 397.
Put 3 as the next digit of the answer. 
Result so far: 136603.8791593
Subtract 1713 from 2110 to get 397.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3970, and continue the process.

Going ahead to step 16:
If we divide 3970 by 571, we get 6 and a remainder of 544.
Record the quotient 6 as the next digit in the result. 
Result so far: 136603.87915936
The remainder is 544 after subtracting 3426 from 3970.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5440, and continue the process.

The final outcome is 136603.87915936, with a leftover of 5.44e-07.