Let's divide 256593 by 18
Our goal is to divide 256593 by 18.

Step 1:
The number 18 fits into 2 0 times, leaving a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Append the next digit (5) from the dividend to 2 and continue with: 25 / 18

Step 2:
If we divide 25 by 18, we get 1 and a remainder of 7.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 18 from 25 and we're left with 7.
Append the next digit (6) from the dividend to 7 and continue with: 76 / 18

Advancing to step 3:
76 divided by 18 is 4 with a remainder of 4.
Write down 4 as next digit of the result. 
Result so far: 14.0
Subtracting 72 from 76 leaves us with 4.
Append the next digit (5) from the dividend to 4 and continue with: 45 / 18

On to step 4:
The number 18 fits into 45 2 times, leaving a remainder of 9.
Use 2 as the next digit of our solution. 
Result so far: 142.0
Subtract 36 from 45 to get 9.
Grab the next digit (9) from the dividend, add it to 9, then carry on: 99 / 18

Step 5:
99 divided by 18 is 5 with a remainder of 9.
Write down 5 as next digit of the result. 
Result so far: 1425.0
The remainder is 9 after subtracting 90 from 99.
Grab the next digit (3) from the dividend, add it to 9, then carry on: 93 / 18

Going ahead to step 6:
If we divide 93 by 18, we get 5 and a remainder of 3.
Use 5 as the next digit of our solution. 
Result so far: 14255.0
Subtract 90 from 93 to 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.

Going ahead to step 7:
If we divide 30 by 18, we get 1 and a remainder of 12.
The number 1 becomes the next digit in our result. 
Result so far: 14255.1
The remainder is 12 after subtracting 18 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 8:
If we divide 120 by 18, we get 6 and a remainder of 12.
The next digit of our result is 6. 
Result so far: 14255.16
If we take 108 away from 120, 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.

On to step 9:
The number 18 fits into 120 6 times, leaving a remainder of 12.
The next digit of our result is 6. 
Result so far: 14255.166
Deduct 108 from 120 and we're left 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.

The final result is 14255.166 with a remainder of 0.0012.