Let's divide 312223 by 15
Our goal is to divide 312223 by 15.

Advancing to step 1:
The number 15 fits into 3 0 times, leaving a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Bring next digit (1) of the dividend behind the 3 and repeat the process: 31 / 15

Going ahead to step 2:
When dividing 31 by 15, we get 2 with a remainder of 1.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtracting 30 from 31 leaves us with 1.
Include the next digit (2) from the dividend after 1, then repeat: 12 / 15

Step 3:
When dividing 12 by 15, we get 0 with a remainder of 12.
Put 0 as the next digit of the answer. 
Result so far: 20.0
If we subtract 0 from 12, we get 12.
Take the next digit (2) from the dividend and append it to 12, then repeat: 122 / 15

Let's proceed to step 4:
15 can be fit into 122 8 times, resulting in a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 208.0
Deduct 120 from 122 and we're left with 2.
Fetch the next digit (2) from the dividend, attach it to 2 and continue: 22 / 15

Let's proceed to step 5:
15 goes into 22 1 times with a remainder of 7.
Write down 1 as next digit of the result. 
Result so far: 2081.0
Subtract 15 from 22 to get 7.
Fetch the next digit (3) from the dividend, attach it to 7 and continue: 73 / 15

Let's proceed to step 6:
When dividing 73 by 15, we get 4 with a remainder of 13.
Put 4 as the next digit of the answer. 
Result so far: 20814.0
Deduct 60 from 73 and we're left with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Step 7:
130 divided by 15 is 8 with a remainder of 10.
Write down 8 as next digit of the result. 
Result so far: 20814.8
Deduct 120 from 130 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.

Going ahead to step 8:
If we divide 100 by 15, we get 6 and a remainder of 10.
The next digit of our result is 6. 
Result so far: 20814.86
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.

Let's proceed 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: 20814.866
Deduct 90 from 100 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.

Our division results in 20814.866 with a remaining 0.001.