We look at the division of 859593 by 18 
We want to figure out the number of times 859593 can be divided by 18.

On to step 1:
18 goes into 8 0 times with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Append the next digit (5) from the dividend to 8 and continue with: 85 / 18

Step 2:
18 can be fit into 85 4 times, resulting in a remainder of 13.
The next digit of our result is 4. 
Result so far: 4.0
If we take 72 away from 85, we end up with 13.
Include the next digit (9) from the dividend after 13, then repeat: 139 / 18

On to step 3:
18 can be fit into 139 7 times, resulting in a remainder of 13.
Record the quotient 7 as the next digit in the result. 
Result so far: 47.0
If we take 126 away from 139, we end up with 13.
Fetch the next digit (5) from the dividend, attach it to 13 and continue: 135 / 18

On to step 4:
18 goes into 135 7 times with a remainder of 9.
The next digit of our result is 7. 
Result so far: 477.0
If we take 126 away from 135, we end up with 9.
Take the next digit (9) from the dividend and append it to 9, then repeat: 99 / 18

On to step 5:
The number 18 fits into 99 5 times, leaving a remainder of 9.
Put 5 as the next digit of the answer. 
Result so far: 4775.0
The remainder is 9 after subtracting 90 from 99.
Include the next digit (3) from the dividend after 9, then repeat: 93 / 18

Let's proceed to step 6:
18 goes into 93 5 times with a remainder of 3.
Use 5 as the next digit of our solution. 
Result so far: 47755.0
The remainder is 3 after subtracting 90 from 93.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 7:
The number 18 fits into 30 1 times, leaving a remainder of 12.
Use 1 as the next digit of our solution. 
Result so far: 47755.1
If we take 18 away from 30, we end up 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.

Let's proceed to step 8:
If we divide 120 by 18, we get 6 and a remainder of 12.
Use 6 as the next digit of our solution. 
Result so far: 47755.16
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.

Advancing to step 9:
18 can be fit into 120 6 times, resulting in a remainder of 12.
The number 6 becomes the next digit in our result. 
Result so far: 47755.166
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.

Our division results in 47755.166 with a remaining 0.0012.