We look at the division of 39951604 by 815 
Our goal is to divide 39951604 by 815.

Step 1:
3 divided by 815 is 0 with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Fetch the next digit (9) from the dividend, attach it to 3 and continue: 39 / 815

Moving on to step 2:
When dividing 39 by 815, we get 0 with a remainder of 39.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 39 and we're left with 39.
Grab the next digit (9) from the dividend, add it to 39, then carry on: 399 / 815

Going ahead to step 3:
815 can be fit into 399 0 times, resulting in a remainder of 399.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 399, we get 399.
Append the next digit (5) from the dividend to 399 and continue with: 3995 / 815

Let's proceed to step 4:
815 can be fit into 3995 4 times, resulting in a remainder of 735.
Write down 4 as next digit of the result. 
Result so far: 4.0
The remainder is 735 after subtracting 3260 from 3995.
Fetch the next digit (1) from the dividend, attach it to 735 and continue: 7351 / 815

Advancing to step 5:
815 can be fit into 7351 9 times, resulting in a remainder of 16.
The number 9 becomes the next digit in our result. 
Result so far: 49.0
Subtracting 7335 from 7351 leaves us with 16.
Include the next digit (6) from the dividend after 16, then repeat: 166 / 815

Advancing to step 6:
If we divide 166 by 815, we get 0 and a remainder of 166.
The number 0 becomes the next digit in our result. 
Result so far: 490.0
If we take 0 away from 166, we end up with 166.
Fetch the next digit (0) from the dividend, attach it to 166 and continue: 1660 / 815

Advancing to step 7:
1660 divided by 815 is 2 with a remainder of 30.
The next digit of our result is 2. 
Result so far: 4902.0
If we subtract 1630 from 1660, we get 30.
Grab the next digit (4) from the dividend, add it to 30, then carry on: 304 / 815

Advancing to step 8:
304 divided by 815 is 0 with a remainder of 304.
Write down 0 as next digit of the result. 
Result so far: 49020.0
Subtracting 0 from 304 leaves us with 304.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3040, and continue the process.

Moving on to step 9:
The number 815 fits into 3040 3 times, leaving a remainder of 595.
Write down 3 as next digit of the result. 
Result so far: 49020.3
If we subtract 2445 from 3040, we get 595.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5950, and continue the process.

Advancing to step 10:
815 goes into 5950 7 times with a remainder of 245.
The number 7 becomes the next digit in our result. 
Result so far: 49020.37
Subtracting 5705 from 5950 leaves us with 245.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2450, and continue the process.

Moving on to step 11:
If we divide 2450 by 815, we get 3 and a remainder of 5.
Record the quotient 3 as the next digit in the result. 
Result so far: 49020.373
The remainder is 5 after subtracting 2445 from 2450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 12:
815 goes into 50 0 times with a remainder of 50.
Put 0 as the next digit of the answer. 
Result so far: 49020.373
If we take 0 away from 50, we end up with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Let's proceed to step 13:
If we divide 500 by 815, we get 0 and a remainder of 500.
Use 0 as the next digit of our solution. 
Result so far: 49020.373
The remainder is 500 after subtracting 0 from 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

In conclusion, the division gives 49020.373 with a balance of 0.0005.