513615 ÷ 18 
We want to figure out the number of times 513615 can be divided by 18.

Step 1:
When dividing 5 by 18, we get 0 with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Fetch the next digit (1) from the dividend, attach it to 5 and continue: 51 / 18

Advancing to step 2:
51 divided by 18 is 2 with a remainder of 15.
Write down 2 as next digit of the result. 
Result so far: 2.0
The remainder is 15 after subtracting 36 from 51.
Bring next digit (3) of the dividend behind the 15 and repeat the process: 153 / 18

Step 3:
153 divided by 18 is 8 with a remainder of 9.
Use 8 as the next digit of our solution. 
Result so far: 28.0
Subtract 144 from 153 to get 9.
Append the next digit (6) from the dividend to 9 and continue with: 96 / 18

Step 4:
If we divide 96 by 18, we get 5 and a remainder of 6.
The next digit of our result is 5. 
Result so far: 285.0
If we subtract 90 from 96, we get 6.
Fetch the next digit (1) from the dividend, attach it to 6 and continue: 61 / 18

Moving on to step 5:
The number 18 fits into 61 3 times, leaving a remainder of 7.
The number 3 becomes the next digit in our result. 
Result so far: 2853.0
Subtracting 54 from 61 leaves us with 7.
Fetch the next digit (5) from the dividend, attach it to 7 and continue: 75 / 18

Moving on to step 6:
When dividing 75 by 18, we get 4 with a remainder of 3.
Use 4 as the next digit of our solution. 
Result so far: 28534.0
If we subtract 72 from 75, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 7:
The number 18 fits into 30 1 times, leaving a remainder of 12.
The next digit of our result is 1. 
Result so far: 28534.1
Subtracting 18 from 30 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 8:
18 goes into 120 6 times with a remainder of 12.
The number 6 becomes the next digit in our result. 
Result so far: 28534.16
The remainder is 12 after subtracting 108 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 9:
120 divided by 18 is 6 with a remainder of 12.
The next digit of our result is 6. 
Result so far: 28534.166
If we subtract 108 from 120, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

The final outcome is 28534.166, with a leftover of 0.0012.