We're dividing 305312 by 20 
Our goal is to divide 305312 by 20.

Going ahead to step 1:
3 divided by 20 is 0 with a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Append the next digit (0) from the dividend to 3 and continue with: 30 / 20

Advancing to step 2:
20 goes into 30 1 times with a remainder of 10.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 20 from 30 and we're left with 10.
Append the next digit (5) from the dividend to 10 and continue with: 105 / 20

Moving on to step 3:
The number 20 fits into 105 5 times, leaving a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 15.0
Deduct 100 from 105 and we're left with 5.
Include the next digit (3) from the dividend after 5, then repeat: 53 / 20

Moving on to step 4:
If we divide 53 by 20, we get 2 and a remainder of 13.
Record the quotient 2 as the next digit in the result. 
Result so far: 152.0
If we subtract 40 from 53, we get 13.
Include the next digit (1) from the dividend after 13, then repeat: 131 / 20

Advancing to step 5:
When dividing 131 by 20, we get 6 with a remainder of 11.
The next digit of our result is 6. 
Result so far: 1526.0
If we take 120 away from 131, we end up with 11.
Fetch the next digit (2) from the dividend, attach it to 11 and continue: 112 / 20

Let's proceed to step 6:
20 goes into 112 5 times with a remainder of 12.
The next digit of our result is 5. 
Result so far: 15265.0
Deduct 100 from 112 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 7:
120 divided by 20 is 6 with a remainder of 0.
The number 6 becomes the next digit in our result. 
Result so far: 15265.6
Subtracting 120 from 120 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 8:
0 divided by 20 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 15265.6
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 9:
If we divide 0 by 20, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 15265.6
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The quotient of the division is 15265.6, and the remainder is 0.0.