856909 ÷ 15 
We want to divide 856909 by 15.

Step 1:
15 can be fit into 8 0 times, resulting in a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Take the next digit (5) from the dividend and append it to 8, then repeat: 85 / 15

Advancing to step 2:
15 goes into 85 5 times with a remainder of 10.
Use 5 as the next digit of our solution. 
Result so far: 5.0
Subtract 75 from 85 to get 10.
Grab the next digit (6) from the dividend, add it to 10, then carry on: 106 / 15

Moving on to step 3:
If we divide 106 by 15, we get 7 and a remainder of 1.
Put 7 as the next digit of the answer. 
Result so far: 57.0
Subtract 105 from 106 to get 1.
Fetch the next digit (9) from the dividend, attach it to 1 and continue: 19 / 15

Let's proceed to step 4:
When dividing 19 by 15, we get 1 with a remainder of 4.
Record the quotient 1 as the next digit in the result. 
Result so far: 571.0
Deduct 15 from 19 and we're left with 4.
Take the next digit (0) from the dividend and append it to 4, then repeat: 40 / 15

Advancing to step 5:
When dividing 40 by 15, we get 2 with a remainder of 10.
The next digit of our result is 2. 
Result so far: 5712.0
Subtracting 30 from 40 leaves us with 10.
Bring next digit (9) of the dividend behind the 10 and repeat the process: 109 / 15

Step 6:
15 can be fit into 109 7 times, resulting in a remainder of 4.
The number 7 becomes the next digit in our result. 
Result so far: 57127.0
Subtracting 105 from 109 leaves us 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.

Going ahead to step 7:
40 divided by 15 is 2 with a remainder of 10.
Put 2 as the next digit of the answer. 
Result so far: 57127.2
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.

Step 8:
The number 15 fits into 100 6 times, leaving a remainder of 10.
Write down 6 as next digit of the result. 
Result so far: 57127.26
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.

Moving on to step 9:
When dividing 100 by 15, we get 6 with a remainder of 10.
The number 6 becomes the next digit in our result. 
Result so far: 57127.266
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 quotient of the division is 57127.266, and the remainder is 0.001.