We look at the division of 821687 by 15 
Let's see how many times 15 fits into 821687.

On to step 1:
15 goes into 8 0 times with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Bring next digit (2) of the dividend behind the 8 and repeat the process: 82 / 15

Let's proceed to step 2:
When dividing 82 by 15, we get 5 with a remainder of 7.
Write down 5 as next digit of the result. 
Result so far: 5.0
If we take 75 away from 82, we end up with 7.
Take the next digit (1) from the dividend and append it to 7, then repeat: 71 / 15

On to step 3:
15 goes into 71 4 times with a remainder of 11.
The number 4 becomes the next digit in our result. 
Result so far: 54.0
Subtracting 60 from 71 leaves us with 11.
Fetch the next digit (6) from the dividend, attach it to 11 and continue: 116 / 15

Advancing to step 4:
When dividing 116 by 15, we get 7 with a remainder of 11.
Record the quotient 7 as the next digit in the result. 
Result so far: 547.0
If we take 105 away from 116, we end up with 11.
Include the next digit (8) from the dividend after 11, then repeat: 118 / 15

Advancing to step 5:
15 goes into 118 7 times with a remainder of 13.
Record the quotient 7 as the next digit in the result. 
Result so far: 5477.0
Subtracting 105 from 118 leaves us with 13.
Grab the next digit (7) from the dividend, add it to 13, then carry on: 137 / 15

Let's proceed to step 6:
If we divide 137 by 15, we get 9 and a remainder of 2.
Use 9 as the next digit of our solution. 
Result so far: 54779.0
The remainder is 2 after subtracting 135 from 137.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 7:
15 can be fit into 20 1 times, resulting in a remainder of 5.
Write down 1 as next digit of the result. 
Result so far: 54779.1
Subtracting 15 from 20 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 8:
15 can be fit into 50 3 times, resulting in a remainder of 5.
Put 3 as the next digit of the answer. 
Result so far: 54779.13
If we take 45 away from 50, we end up with 5.
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 9:
If we divide 50 by 15, we get 3 and a remainder of 5.
Put 3 as the next digit of the answer. 
Result so far: 54779.133
The remainder is 5 after subtracting 45 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

The final outcome is 54779.133, with a leftover of 0.0005.