We divide 258349 by 15
We want to divide 258349 by 15.

Let's proceed to step 1:
15 goes into 2 0 times with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Fetch the next digit (5) from the dividend, attach it to 2 and continue: 25 / 15

Step 2:
15 can be fit into 25 1 times, resulting in a remainder of 10.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 15 from 25 to get 10.
Bring next digit (8) of the dividend behind the 10 and repeat the process: 108 / 15

Moving on to step 3:
When dividing 108 by 15, we get 7 with a remainder of 3.
Record the quotient 7 as the next digit in the result. 
Result so far: 17.0
Subtracting 105 from 108 leaves us with 3.
Append the next digit (3) from the dividend to 3 and continue with: 33 / 15

On to step 4:
If we divide 33 by 15, we get 2 and a remainder of 3.
The number 2 becomes the next digit in our result. 
Result so far: 172.0
If we take 30 away from 33, we end up with 3.
Take the next digit (4) from the dividend and append it to 3, then repeat: 34 / 15

Going ahead to step 5:
The number 15 fits into 34 2 times, leaving a remainder of 4.
Put 2 as the next digit of the answer. 
Result so far: 1722.0
If we take 30 away from 34, we end up with 4.
Include the next digit (9) from the dividend after 4, then repeat: 49 / 15

Going ahead to step 6:
15 goes into 49 3 times with a remainder of 4.
Put 3 as the next digit of the answer. 
Result so far: 17223.0
If we take 45 away from 49, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 7:
15 goes into 40 2 times with a remainder of 10.
Record the quotient 2 as the next digit in the result. 
Result so far: 17223.2
Deduct 30 from 40 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.

Let's proceed to step 8:
15 goes into 100 6 times with a remainder of 10.
Put 6 as the next digit of the answer. 
Result so far: 17223.26
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.

Advancing to step 9:
15 can be fit into 100 6 times, resulting in a remainder of 10.
Write down 6 as next digit of the result. 
Result so far: 17223.266
The remainder is 10 after subtracting 90 from 100.
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 outcome is 17223.266, with a leftover of 0.001.