We're dividing 315391 by 17 
We want to figure out the number of times 315391 can be divided by 17.

Moving on to step 1:
17 goes into 3 0 times with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Grab the next digit (1) from the dividend, add it to 3, then carry on: 31 / 17

Moving on to step 2:
If we divide 31 by 17, we get 1 and a remainder of 14.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 17 from 31 and we're left with 14.
Fetch the next digit (5) from the dividend, attach it to 14 and continue: 145 / 17

Let's proceed to step 3:
145 divided by 17 is 8 with a remainder of 9.
Put 8 as the next digit of the answer. 
Result so far: 18.0
The remainder is 9 after subtracting 136 from 145.
Append the next digit (3) from the dividend to 9 and continue with: 93 / 17

On to step 4:
17 can be fit into 93 5 times, resulting in a remainder of 8.
The next digit of our result is 5. 
Result so far: 185.0
If we subtract 85 from 93, we get 8.
Bring next digit (9) of the dividend behind the 8 and repeat the process: 89 / 17

Going ahead to step 5:
89 divided by 17 is 5 with a remainder of 4.
Record the quotient 5 as the next digit in the result. 
Result so far: 1855.0
Subtracting 85 from 89 leaves us with 4.
Append the next digit (1) from the dividend to 4 and continue with: 41 / 17

Let's proceed to step 6:
If we divide 41 by 17, we get 2 and a remainder of 7.
Record the quotient 2 as the next digit in the result. 
Result so far: 18552.0
Subtract 34 from 41 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Let's proceed to step 7:
When dividing 70 by 17, we get 4 with a remainder of 2.
Record the quotient 4 as the next digit in the result. 
Result so far: 18552.4
If we take 68 away from 70, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 8:
If we divide 20 by 17, we get 1 and a remainder of 3.
The number 1 becomes the next digit in our result. 
Result so far: 18552.41
The remainder is 3 after subtracting 17 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 9:
The number 17 fits into 30 1 times, leaving a remainder of 13.
Write down 1 as next digit of the result. 
Result so far: 18552.411
Deduct 17 from 30 and we're left with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

The final result is 18552.411 with a remainder of 0.0013.