We divide 510871 by 30
Let's see how many times 30 fits into 510871.

On to step 1:
30 can be fit into 5 0 times, resulting in a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 30

Moving on to step 2:
30 can be fit into 51 1 times, resulting in a remainder of 21.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 30 away from 51, we end up with 21.
Include the next digit (0) from the dividend after 21, then repeat: 210 / 30

On to step 3:
The number 30 fits into 210 7 times, leaving a remainder of 0.
The number 7 becomes the next digit in our result. 
Result so far: 17.0
Deduct 210 from 210 and we're left with 0.
Bring next digit (8) of the dividend behind the 0 and repeat the process: 8 / 30

On to step 4:
If we divide 8 by 30, we get 0 and a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 170.0
Deduct 0 from 8 and we're left with 8.
Include the next digit (7) from the dividend after 8, then repeat: 87 / 30

Let's proceed to step 5:
87 divided by 30 is 2 with a remainder of 27.
Put 2 as the next digit of the answer. 
Result so far: 1702.0
Subtract 60 from 87 to get 27.
Include the next digit (1) from the dividend after 27, then repeat: 271 / 30

Moving on to step 6:
30 goes into 271 9 times with a remainder of 1.
Use 9 as the next digit of our solution. 
Result so far: 17029.0
If we subtract 270 from 271, we get 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:
The number 30 fits into 10 0 times, leaving a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 17029.0
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 8:
The number 30 fits into 100 3 times, leaving a remainder of 10.
Use 3 as the next digit of our solution. 
Result so far: 17029.03
If we take 90 away from 100, we end up 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.

Advancing to step 9:
When dividing 100 by 30, we get 3 with a remainder of 10.
The number 3 becomes the next digit in our result. 
Result so far: 17029.033
If we subtract 90 from 100, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

After the division, we end up with 17029.033 and a remainder of 0.001.