18039690 divided by 815 
Let's see how many times 815 fits into 18039690.

Step 1:
The number 815 fits into 1 0 times, leaving a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Take the next digit (8) from the dividend and append it to 1, then repeat: 18 / 815

Moving on to step 2:
The number 815 fits into 18 0 times, leaving a remainder of 18.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 18 and we're left with 18.
Include the next digit (0) from the dividend after 18, then repeat: 180 / 815

Moving on to step 3:
The number 815 fits into 180 0 times, leaving a remainder of 180.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 180 to get 180.
Take the next digit (3) from the dividend and append it to 180, then repeat: 1803 / 815

Going ahead to step 4:
The number 815 fits into 1803 2 times, leaving a remainder of 173.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Subtracting 1630 from 1803 leaves us with 173.
Take the next digit (9) from the dividend and append it to 173, then repeat: 1739 / 815

Going ahead to step 5:
When dividing 1739 by 815, we get 2 with a remainder of 109.
Use 2 as the next digit of our solution. 
Result so far: 22.0
If we take 1630 away from 1739, we end up with 109.
Fetch the next digit (6) from the dividend, attach it to 109 and continue: 1096 / 815

Going ahead to step 6:
The number 815 fits into 1096 1 times, leaving a remainder of 281.
Write down 1 as next digit of the result. 
Result so far: 221.0
The remainder is 281 after subtracting 815 from 1096.
Bring next digit (9) of the dividend behind the 281 and repeat the process: 2819 / 815

Moving on to step 7:
If we divide 2819 by 815, we get 3 and a remainder of 374.
The next digit of our result is 3. 
Result so far: 2213.0
If we subtract 2445 from 2819, we get 374.
Include the next digit (0) from the dividend after 374, then repeat: 3740 / 815

Step 8:
The number 815 fits into 3740 4 times, leaving a remainder of 480.
Use 4 as the next digit of our solution. 
Result so far: 22134.0
If we take 3260 away from 3740, we end up with 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

Let's proceed to step 9:
815 goes into 4800 5 times with a remainder of 725.
Record the quotient 5 as the next digit in the result. 
Result so far: 22134.5
If we subtract 4075 from 4800, we get 725.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7250, and continue the process.

Going ahead to step 10:
815 goes into 7250 8 times with a remainder of 730.
The next digit of our result is 8. 
Result so far: 22134.58
The remainder is 730 after subtracting 6520 from 7250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7300, and continue the process.

Let's proceed to step 11:
If we divide 7300 by 815, we get 8 and a remainder of 780.
The number 8 becomes the next digit in our result. 
Result so far: 22134.588
Subtracting 6520 from 7300 leaves us with 780.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7800, and continue the process.

The final result is 22134.588 with a remainder of 0.078.