258629 ÷ 18 
We're looking to find how many times 18 goes into 258629.

Advancing to step 1:
2 divided by 18 is 0 with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Bring next digit (5) of the dividend behind the 2 and repeat the process: 25 / 18

Advancing to step 2:
18 can be fit into 25 1 times, resulting in a remainder of 7.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtracting 18 from 25 leaves us with 7.
Take the next digit (8) from the dividend and append it to 7, then repeat: 78 / 18

Step 3:
When dividing 78 by 18, we get 4 with a remainder of 6.
Put 4 as the next digit of the answer. 
Result so far: 14.0
If we take 72 away from 78, we end up with 6.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 18

Step 4:
18 can be fit into 66 3 times, resulting in a remainder of 12.
Put 3 as the next digit of the answer. 
Result so far: 143.0
Deduct 54 from 66 and we're left with 12.
Take the next digit (2) from the dividend and append it to 12, then repeat: 122 / 18

Step 5:
122 divided by 18 is 6 with a remainder of 14.
Record the quotient 6 as the next digit in the result. 
Result so far: 1436.0
If we take 108 away from 122, we end up with 14.
Fetch the next digit (9) from the dividend, attach it to 14 and continue: 149 / 18

Moving on to step 6:
149 divided by 18 is 8 with a remainder of 5.
The next digit of our result is 8. 
Result so far: 14368.0
The remainder is 5 after subtracting 144 from 149.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 7:
50 divided by 18 is 2 with a remainder of 14.
Write down 2 as next digit of the result. 
Result so far: 14368.2
Deduct 36 from 50 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

On to step 8:
18 can be fit into 140 7 times, resulting in a remainder of 14.
Use 7 as the next digit of our solution. 
Result so far: 14368.27
If we take 126 away from 140, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

On to step 9:
140 divided by 18 is 7 with a remainder of 14.
Write down 7 as next digit of the result. 
Result so far: 14368.277
If we take 126 away from 140, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

The final result is 14368.277 with a remainder of 0.0014.