We divide 438307 by 15
We want to figure out the number of times 438307 can be divided by 15.

Going ahead to step 1:
15 can be fit into 4 0 times, resulting in a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Append the next digit (3) from the dividend to 4 and continue with: 43 / 15

Let's proceed to step 2:
If we divide 43 by 15, we get 2 and a remainder of 13.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we take 30 away from 43, we end up with 13.
Bring next digit (8) of the dividend behind the 13 and repeat the process: 138 / 15

Let's proceed to step 3:
15 can be fit into 138 9 times, resulting in a remainder of 3.
Write down 9 as next digit of the result. 
Result so far: 29.0
Subtract 135 from 138 to get 3.
Grab the next digit (3) from the dividend, add it to 3, then carry on: 33 / 15

Advancing to step 4:
When dividing 33 by 15, we get 2 with a remainder of 3.
The next digit of our result is 2. 
Result so far: 292.0
If we subtract 30 from 33, we get 3.
Fetch the next digit (0) from the dividend, attach it to 3 and continue: 30 / 15

Step 5:
If we divide 30 by 15, we get 2 and a remainder of 0.
The number 2 becomes the next digit in our result. 
Result so far: 2922.0
If we subtract 30 from 30, we get 0.
Include the next digit (7) from the dividend after 0, then repeat: 7 / 15

On to step 6:
7 divided by 15 is 0 with a remainder of 7.
The next digit of our result is 0. 
Result so far: 29220.0
Deduct 0 from 7 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 7:
15 goes into 70 4 times with a remainder of 10.
Record the quotient 4 as the next digit in the result. 
Result so far: 29220.4
If we take 60 away from 70, 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.

Going ahead to step 8:
When dividing 100 by 15, we get 6 with a remainder of 10.
The next digit of our result is 6. 
Result so far: 29220.46
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.

Going ahead to step 9:
The number 15 fits into 100 6 times, leaving a remainder of 10.
Put 6 as the next digit of the answer. 
Result so far: 29220.466
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 final result is 29220.466 with a remainder of 0.001.