We look at the division of 259939 by 18 
We want to divide 259939 by 18.

Going ahead to step 1:
When dividing 2 by 18, we get 0 with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Fetch the next digit (5) from the dividend, attach it to 2 and continue: 25 / 18

Step 2:
If we divide 25 by 18, we get 1 and a remainder of 7.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we take 18 away from 25, we end up with 7.
Bring next digit (9) of the dividend behind the 7 and repeat the process: 79 / 18

On to step 3:
18 can be fit into 79 4 times, resulting in a remainder of 7.
The next digit of our result is 4. 
Result so far: 14.0
The remainder is 7 after subtracting 72 from 79.
Fetch the next digit (9) from the dividend, attach it to 7 and continue: 79 / 18

Going ahead to step 4:
If we divide 79 by 18, we get 4 and a remainder of 7.
Put 4 as the next digit of the answer. 
Result so far: 144.0
Subtracting 72 from 79 leaves us with 7.
Fetch the next digit (3) from the dividend, attach it to 7 and continue: 73 / 18

Moving on to step 5:
18 goes into 73 4 times with a remainder of 1.
The number 4 becomes the next digit in our result. 
Result so far: 1444.0
Subtract 72 from 73 to get 1.
Bring next digit (9) of the dividend behind the 1 and repeat the process: 19 / 18

Going ahead to step 6:
When dividing 19 by 18, we get 1 with a remainder of 1.
The next digit of our result is 1. 
Result so far: 14441.0
If we take 18 away from 19, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 7:
18 goes into 10 0 times with a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 14441.0
Deduct 0 from 10 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 8:
The number 18 fits into 100 5 times, leaving a remainder of 10.
The next digit of our result is 5. 
Result so far: 14441.05
Deduct 90 from 100 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 9:
When dividing 100 by 18, we get 5 with a remainder of 10.
Write down 5 as next digit of the result. 
Result so far: 14441.055
If we subtract 90 from 100, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The final result is 14441.055 with a remainder of 0.001.