We look at the division of 520912 by 31 
We want to divide 520912 by 31.

On to step 1:
If we divide 5 by 31, we get 0 and a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Bring next digit (2) of the dividend behind the 5 and repeat the process: 52 / 31

Going ahead to step 2:
52 divided by 31 is 1 with a remainder of 21.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we subtract 31 from 52, we get 21.
Grab the next digit (0) from the dividend, add it to 21, then carry on: 210 / 31

On to step 3:
The number 31 fits into 210 6 times, leaving a remainder of 24.
Record the quotient 6 as the next digit in the result. 
Result so far: 16.0
Subtracting 186 from 210 leaves us with 24.
Take the next digit (9) from the dividend and append it to 24, then repeat: 249 / 31

Advancing to step 4:
31 goes into 249 8 times with a remainder of 1.
The number 8 becomes the next digit in our result. 
Result so far: 168.0
If we take 248 away from 249, we end up with 1.
Fetch the next digit (1) from the dividend, attach it to 1 and continue: 11 / 31

Step 5:
The number 31 fits into 11 0 times, leaving a remainder of 11.
The next digit of our result is 0. 
Result so far: 1680.0
If we subtract 0 from 11, we get 11.
Include the next digit (2) from the dividend after 11, then repeat: 112 / 31

Step 6:
31 can be fit into 112 3 times, resulting in a remainder of 19.
Record the quotient 3 as the next digit in the result. 
Result so far: 16803.0
If we subtract 93 from 112, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Let's proceed to step 7:
When dividing 190 by 31, we get 6 with a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 16803.6
Subtracting 186 from 190 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 8:
31 goes into 40 1 times with a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 16803.61
Deduct 31 from 40 and we're left with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 9:
31 can be fit into 90 2 times, resulting in a remainder of 28.
The number 2 becomes the next digit in our result. 
Result so far: 16803.612
If we subtract 62 from 90, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Let's proceed to step 10:
31 goes into 280 9 times with a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 16803.6129
Deduct 279 from 280 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 11:
10 divided by 31 is 0 with a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 16803.6129
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 12:
The number 31 fits into 100 3 times, leaving a remainder of 7.
The next digit of our result is 3. 
Result so far: 16803.612903
Subtracting 93 from 100 leaves us 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.

Going ahead to step 13:
If we divide 70 by 31, we get 2 and a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 16803.6129032
If we take 62 away from 70, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 14:
The number 31 fits into 80 2 times, leaving a remainder of 18.
Write down 2 as next digit of the result. 
Result so far: 16803.61290322
Deduct 62 from 80 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

After the division, we end up with 16803.61290322 and a remainder of 1.8e-08.