We're dividing 43920570 by 815 
We're looking to find how many times 815 goes into 43920570.

Step 1:
815 can be fit into 4 0 times, resulting in a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Include the next digit (3) from the dividend after 4, then repeat: 43 / 815

Step 2:
43 divided by 815 is 0 with a remainder of 43.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 43 to get 43.
Include the next digit (9) from the dividend after 43, then repeat: 439 / 815

Going ahead to step 3:
815 can be fit into 439 0 times, resulting in a remainder of 439.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 439 to get 439.
Append the next digit (2) from the dividend to 439 and continue with: 4392 / 815

Advancing to step 4:
4392 divided by 815 is 5 with a remainder of 317.
Use 5 as the next digit of our solution. 
Result so far: 5.0
If we subtract 4075 from 4392, we get 317.
Bring next digit (0) of the dividend behind the 317 and repeat the process: 3170 / 815

Moving on to step 5:
815 can be fit into 3170 3 times, resulting in a remainder of 725.
The number 3 becomes the next digit in our result. 
Result so far: 53.0
If we subtract 2445 from 3170, we get 725.
Bring next digit (5) of the dividend behind the 725 and repeat the process: 7255 / 815

Advancing to step 6:
The number 815 fits into 7255 8 times, leaving a remainder of 735.
The number 8 becomes the next digit in our result. 
Result so far: 538.0
If we take 6520 away from 7255, we end up with 735.
Append the next digit (7) from the dividend to 735 and continue with: 7357 / 815

Going ahead to step 7:
815 can be fit into 7357 9 times, resulting in a remainder of 22.
Write down 9 as next digit of the result. 
Result so far: 5389.0
If we take 7335 away from 7357, we end up with 22.
Grab the next digit (0) from the dividend, add it to 22, then carry on: 220 / 815

Step 8:
When dividing 220 by 815, we get 0 with a remainder of 220.
The next digit of our result is 0. 
Result so far: 53890.0
Deduct 0 from 220 and we're left with 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Moving on to step 9:
815 goes into 2200 2 times with a remainder of 570.
The next digit of our result is 2. 
Result so far: 53890.2
The remainder is 570 after subtracting 1630 from 2200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5700, and continue the process.

Advancing to step 10:
When dividing 5700 by 815, we get 6 with a remainder of 810.
Use 6 as the next digit of our solution. 
Result so far: 53890.26
The remainder is 810 after subtracting 4890 from 5700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8100, and continue the process.

Moving on to step 11:
815 can be fit into 8100 9 times, resulting in a remainder of 765.
Use 9 as the next digit of our solution. 
Result so far: 53890.269
Deduct 7335 from 8100 and we're left with 765.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7650, and continue the process.

Let's proceed to step 12:
When dividing 7650 by 815, we get 9 with a remainder of 315.
Use 9 as the next digit of our solution. 
Result so far: 53890.2699
Subtract 7335 from 7650 to get 315.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3150, and continue the process.

In conclusion, the division gives 53890.2699 with a balance of 0.00315.