686580 ÷ 17 
We're looking to find how many times 17 goes into 686580.

On to step 1:
When dividing 6 by 17, we get 0 with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Grab the next digit (8) from the dividend, add it to 6, then carry on: 68 / 17

On to step 2:
17 goes into 68 4 times with a remainder of 0.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Subtracting 68 from 68 leaves us with 0.
Take the next digit (6) from the dividend and append it to 0, then repeat: 6 / 17

On to step 3:
17 can be fit into 6 0 times, resulting in a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 40.0
Subtract 0 from 6 to get 6.
Take the next digit (5) from the dividend and append it to 6, then repeat: 65 / 17

On to step 4:
When dividing 65 by 17, we get 3 with a remainder of 14.
Write down 3 as next digit of the result. 
Result so far: 403.0
Deduct 51 from 65 and we're left with 14.
Take the next digit (8) from the dividend and append it to 14, then repeat: 148 / 17

On to step 5:
The number 17 fits into 148 8 times, leaving a remainder of 12.
Put 8 as the next digit of the answer. 
Result so far: 4038.0
Subtracting 136 from 148 leaves us with 12.
Grab the next digit (0) from the dividend, add it to 12, then carry on: 120 / 17

Going ahead to step 6:
17 goes into 120 7 times with a remainder of 1.
Record the quotient 7 as the next digit in the result. 
Result so far: 40387.0
The remainder is 1 after subtracting 119 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 7:
When dividing 10 by 17, we get 0 with a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 40387.0
Subtracting 0 from 10 leaves us 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:
100 divided by 17 is 5 with a remainder of 15.
Write down 5 as next digit of the result. 
Result so far: 40387.05
Deduct 85 from 100 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Moving on to step 9:
When dividing 150 by 17, we get 8 with a remainder of 14.
The next digit of our result is 8. 
Result so far: 40387.058
If we subtract 136 from 150, we get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 10:
17 can be fit into 140 8 times, resulting in a remainder of 4.
Write down 8 as next digit of the result. 
Result so far: 40387.0588
If we subtract 136 from 140, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

The final result is 40387.0588 with a remainder of 4e-05.