We look at the division of 520220 by 12 
We're looking to find how many times 12 goes into 520220.

Moving on to step 1:
If we divide 5 by 12, we get 0 and a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Include the next digit (2) from the dividend after 5, then repeat: 52 / 12

Advancing to step 2:
The number 12 fits into 52 4 times, leaving a remainder of 4.
The next digit of our result is 4. 
Result so far: 4.0
Deduct 48 from 52 and we're left with 4.
Grab the next digit (0) from the dividend, add it to 4, then carry on: 40 / 12

Advancing to step 3:
When dividing 40 by 12, we get 3 with a remainder of 4.
Put 3 as the next digit of the answer. 
Result so far: 43.0
Deduct 36 from 40 and we're left with 4.
Append the next digit (2) from the dividend to 4 and continue with: 42 / 12

Going ahead to step 4:
When dividing 42 by 12, we get 3 with a remainder of 6.
Write down 3 as next digit of the result. 
Result so far: 433.0
If we subtract 36 from 42, we get 6.
Grab the next digit (2) from the dividend, add it to 6, then carry on: 62 / 12

Advancing to step 5:
The number 12 fits into 62 5 times, leaving a remainder of 2.
Use 5 as the next digit of our solution. 
Result so far: 4335.0
Subtracting 60 from 62 leaves us with 2.
Append the next digit (0) from the dividend to 2 and continue with: 20 / 12

Moving on to step 6:
The number 12 fits into 20 1 times, leaving a remainder of 8.
The next digit of our result is 1. 
Result so far: 43351.0
Deduct 12 from 20 and we're left 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.

Moving on to step 7:
12 can be fit into 80 6 times, resulting in a remainder of 8.
The number 6 becomes the next digit in our result. 
Result so far: 43351.6
Subtracting 72 from 80 leaves us 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.

Moving on to step 8:
12 can be fit into 80 6 times, resulting in a remainder of 8.
The next digit of our result is 6. 
Result so far: 43351.66
Deduct 72 from 80 and we're left 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.

The final result is 43351.66 with a remainder of 0.008.