Let's divide 405220 by 15
We're looking to find how many times 15 goes into 405220.

On to step 1:
The number 15 fits into 4 0 times, leaving a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Bring next digit (0) of the dividend behind the 4 and repeat the process: 40 / 15

Moving on to step 2:
The number 15 fits into 40 2 times, leaving a remainder of 10.
Write down 2 as next digit of the result. 
Result so far: 2.0
Subtract 30 from 40 to get 10.
Bring next digit (5) of the dividend behind the 10 and repeat the process: 105 / 15

Moving on to step 3:
The number 15 fits into 105 7 times, leaving a remainder of 0.
The number 7 becomes the next digit in our result. 
Result so far: 27.0
If we subtract 105 from 105, we get 0.
Take the next digit (2) from the dividend and append it to 0, then repeat: 2 / 15

Let's proceed to step 4:
When dividing 2 by 15, we get 0 with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 270.0
If we subtract 0 from 2, we get 2.
Append the next digit (2) from the dividend to 2 and continue with: 22 / 15

Step 5:
When dividing 22 by 15, we get 1 with a remainder of 7.
Record the quotient 1 as the next digit in the result. 
Result so far: 2701.0
Subtract 15 from 22 to get 7.
Grab the next digit (0) from the dividend, add it to 7, then carry on: 70 / 15

Let's proceed to step 6:
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: 27014.0
Subtracting 60 from 70 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.

On to step 7:
If we divide 100 by 15, we get 6 and a remainder of 10.
Write down 6 as next digit of the result. 
Result so far: 27014.6
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.

Moving on to step 8:
15 goes into 100 6 times with a remainder of 10.
The number 6 becomes the next digit in our result. 
Result so far: 27014.66
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.

Our division results in 27014.66 with a remaining 0.01.