315440 ÷ 15 
Let's see how many times 15 fits into 315440.

Let's proceed to step 1:
If we divide 3 by 15, we get 0 and a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Include the next digit (1) from the dividend after 3, then repeat: 31 / 15

Moving on to step 2:
31 divided by 15 is 2 with a remainder of 1.
Use 2 as the next digit of our solution. 
Result so far: 2.0
The remainder is 1 after subtracting 30 from 31.
Append the next digit (5) from the dividend to 1 and continue with: 15 / 15

Let's proceed to step 3:
15 goes into 15 1 times with a remainder of 0.
Use 1 as the next digit of our solution. 
Result so far: 21.0
Subtracting 15 from 15 leaves us with 0.
Grab the next digit (4) from the dividend, add it to 0, then carry on: 4 / 15

Moving on to step 4:
15 can be fit into 4 0 times, resulting in a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 210.0
If we take 0 away from 4, we end up with 4.
Take the next digit (4) from the dividend and append it to 4, then repeat: 44 / 15

Moving on to step 5:
15 goes into 44 2 times with a remainder of 14.
Write down 2 as next digit of the result. 
Result so far: 2102.0
Subtract 30 from 44 to get 14.
Append the next digit (0) from the dividend to 14 and continue with: 140 / 15

On to step 6:
140 divided by 15 is 9 with a remainder of 5.
Record the quotient 9 as the next digit in the result. 
Result so far: 21029.0
If we take 135 away from 140, 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.

On to step 7:
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: 21029.3
If we subtract 45 from 50, we get 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: 21029.33
Deduct 45 from 50 and we're left 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.

Our division results in 21029.33 with a remaining 0.005.