309709 divided by 15 
We want to figure out the number of times 309709 can be divided by 15.

Let's proceed to step 1:
When dividing 3 by 15, we get 0 with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Fetch the next digit (0) from the dividend, attach it to 3 and continue: 30 / 15

Step 2:
When dividing 30 by 15, we get 2 with a remainder of 0.
Write down 2 as next digit of the result. 
Result so far: 2.0
Subtracting 30 from 30 leaves us with 0.
Append the next digit (9) from the dividend to 0 and continue with: 9 / 15

Step 3:
15 can be fit into 9 0 times, resulting in a remainder of 9.
The next digit of our result is 0. 
Result so far: 20.0
Subtract 0 from 9 to get 9.
Bring next digit (7) of the dividend behind the 9 and repeat the process: 97 / 15

On to step 4:
97 divided by 15 is 6 with a remainder of 7.
Use 6 as the next digit of our solution. 
Result so far: 206.0
Subtract 90 from 97 to get 7.
Fetch the next digit (0) from the dividend, attach it to 7 and continue: 70 / 15

On to step 5:
15 goes into 70 4 times with a remainder of 10.
The number 4 becomes the next digit in our result. 
Result so far: 2064.0
If we subtract 60 from 70, we get 10.
Fetch the next digit (9) from the dividend, attach it to 10 and continue: 109 / 15

Moving on to step 6:
When dividing 109 by 15, we get 7 with a remainder of 4.
Use 7 as the next digit of our solution. 
Result so far: 20647.0
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.

Step 7:
When dividing 40 by 15, we get 2 with a remainder of 10.
The next digit of our result is 2. 
Result so far: 20647.2
If we take 30 away from 40, we end up 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:
When dividing 100 by 15, we get 6 with a remainder of 10.
Write down 6 as next digit of the result. 
Result so far: 20647.26
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.

Step 9:
100 divided by 15 is 6 with a remainder of 10.
The number 6 becomes the next digit in our result. 
Result so far: 20647.266
Subtracting 90 from 100 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.

The quotient of the division is 20647.266, and the remainder is 0.001.