We're dividing 512521 by 30 
Our goal is to divide 512521 by 30.

Let's proceed to step 1:
5 divided by 30 is 0 with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Fetch the next digit (1) from the dividend, attach it to 5 and continue: 51 / 30

Moving on to step 2:
If we divide 51 by 30, we get 1 and a remainder of 21.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we subtract 30 from 51, we get 21.
Include the next digit (2) from the dividend after 21, then repeat: 212 / 30

Let's proceed to step 3:
If we divide 212 by 30, we get 7 and a remainder of 2.
Record the quotient 7 as the next digit in the result. 
Result so far: 17.0
Deduct 210 from 212 and we're left with 2.
Bring next digit (5) of the dividend behind the 2 and repeat the process: 25 / 30

On to step 4:
When dividing 25 by 30, we get 0 with a remainder of 25.
Put 0 as the next digit of the answer. 
Result so far: 170.0
Subtracting 0 from 25 leaves us with 25.
Bring next digit (2) of the dividend behind the 25 and repeat the process: 252 / 30

Moving on to step 5:
252 divided by 30 is 8 with a remainder of 12.
The number 8 becomes the next digit in our result. 
Result so far: 1708.0
If we subtract 240 from 252, we get 12.
Grab the next digit (1) from the dividend, add it to 12, then carry on: 121 / 30

Let's proceed to step 6:
If we divide 121 by 30, we get 4 and a remainder of 1.
Put 4 as the next digit of the answer. 
Result so far: 17084.0
Deduct 120 from 121 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.

Going ahead to step 7:
10 divided by 30 is 0 with a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 17084.0
Subtracting 0 from 10 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.

Step 8:
100 divided by 30 is 3 with a remainder of 10.
Put 3 as the next digit of the answer. 
Result so far: 17084.03
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.

Going ahead to step 9:
30 can be fit into 100 3 times, resulting in a remainder of 10.
Use 3 as the next digit of our solution. 
Result so far: 17084.033
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.

The final result is 17084.033 with a remainder of 0.001.