20515605 ÷ 518 
We want to divide 20515605 by 518.

Advancing to step 1:
If we divide 2 by 518, we get 0 and a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Take the next digit (0) from the dividend and append it to 2, then repeat: 20 / 518

Going ahead to step 2:
If we divide 20 by 518, we get 0 and a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 20, we end up with 20.
Bring next digit (5) of the dividend behind the 20 and repeat the process: 205 / 518

Going ahead to step 3:
When dividing 205 by 518, we get 0 with a remainder of 205.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 205 to get 205.
Fetch the next digit (1) from the dividend, attach it to 205 and continue: 2051 / 518

Advancing to step 4:
518 can be fit into 2051 3 times, resulting in a remainder of 497.
Use 3 as the next digit of our solution. 
Result so far: 3.0
Subtract 1554 from 2051 to get 497.
Take the next digit (5) from the dividend and append it to 497, then repeat: 4975 / 518

Moving on to step 5:
518 can be fit into 4975 9 times, resulting in a remainder of 313.
The number 9 becomes the next digit in our result. 
Result so far: 39.0
Deduct 4662 from 4975 and we're left with 313.
Bring next digit (6) of the dividend behind the 313 and repeat the process: 3136 / 518

Let's proceed to step 6:
3136 divided by 518 is 6 with a remainder of 28.
Put 6 as the next digit of the answer. 
Result so far: 396.0
If we take 3108 away from 3136, we end up with 28.
Fetch the next digit (0) from the dividend, attach it to 28 and continue: 280 / 518

Moving on to step 7:
518 goes into 280 0 times with a remainder of 280.
Record the quotient 0 as the next digit in the result. 
Result so far: 3960.0
If we subtract 0 from 280, we get 280.
Include the next digit (5) from the dividend after 280, then repeat: 2805 / 518

Step 8:
2805 divided by 518 is 5 with a remainder of 215.
Use 5 as the next digit of our solution. 
Result so far: 39605.0
If we subtract 2590 from 2805, we get 215.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2150, and continue the process.

On to step 9:
The number 518 fits into 2150 4 times, leaving a remainder of 78.
Use 4 as the next digit of our solution. 
Result so far: 39605.4
Subtracting 2072 from 2150 leaves us with 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

On to step 10:
If we divide 780 by 518, we get 1 and a remainder of 262.
The number 1 becomes the next digit in our result. 
Result so far: 39605.41
Subtracting 518 from 780 leaves us with 262.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2620, and continue the process.

Going ahead to step 11:
When dividing 2620 by 518, we get 5 with a remainder of 30.
Put 5 as the next digit of the answer. 
Result so far: 39605.415
If we subtract 2590 from 2620, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 12:
518 goes into 300 0 times with a remainder of 300.
Use 0 as the next digit of our solution. 
Result so far: 39605.415
Subtracting 0 from 300 leaves us with 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

Let's proceed to step 13:
The number 518 fits into 3000 5 times, leaving a remainder of 410.
Write down 5 as next digit of the result. 
Result so far: 39605.41505
If we take 2590 away from 3000, we end up with 410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4100, and continue the process.

On to step 14:
The number 518 fits into 4100 7 times, leaving a remainder of 474.
Write down 7 as next digit of the result. 
Result so far: 39605.415057
Deduct 3626 from 4100 and we're left with 474.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4740, and continue the process.

Step 15:
If we divide 4740 by 518, we get 9 and a remainder of 78.
Write down 9 as next digit of the result. 
Result so far: 39605.4150579
Deduct 4662 from 4740 and we're left with 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Going ahead to step 16:
When dividing 780 by 518, we get 1 with a remainder of 262.
Put 1 as the next digit of the answer. 
Result so far: 39605.41505791
Subtract 518 from 780 to get 262.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2620, and continue the process.

In conclusion, the division gives 39605.41505791 with a balance of 2.62e-07.