510401 divided by 30 
Let's see how many times 30 fits into 510401.

Step 1:
The number 30 fits into 5 0 times, leaving a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Bring next digit (1) of the dividend behind the 5 and repeat the process: 51 / 30

Advancing to step 2:
The number 30 fits into 51 1 times, leaving a remainder of 21.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 30 from 51 to get 21.
Take the next digit (0) from the dividend and append it to 21, then repeat: 210 / 30

Moving on to step 3:
30 goes into 210 7 times with a remainder of 0.
Record the quotient 7 as the next digit in the result. 
Result so far: 17.0
If we subtract 210 from 210, we get 0.
Include the next digit (4) from the dividend after 0, then repeat: 4 / 30

Going ahead to step 4:
30 can be fit into 4 0 times, resulting in a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 170.0
Subtracting 0 from 4 leaves us with 4.
Include the next digit (0) from the dividend after 4, then repeat: 40 / 30

Advancing to step 5:
30 can be fit into 40 1 times, resulting in a remainder of 10.
The next digit of our result is 1. 
Result so far: 1701.0
If we subtract 30 from 40, we get 10.
Take the next digit (1) from the dividend and append it to 10, then repeat: 101 / 30

Moving on to step 6:
If we divide 101 by 30, we get 3 and a remainder of 11.
The next digit of our result is 3. 
Result so far: 17013.0
Subtract 90 from 101 to get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Advancing to step 7:
30 goes into 110 3 times with a remainder of 20.
Record the quotient 3 as the next digit in the result. 
Result so far: 17013.3
If we take 90 away from 110, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 8:
200 divided by 30 is 6 with a remainder of 20.
Use 6 as the next digit of our solution. 
Result so far: 17013.36
If we take 180 away from 200, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 9:
200 divided by 30 is 6 with a remainder of 20.
The next digit of our result is 6. 
Result so far: 17013.366
Subtract 180 from 200 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Our division results in 17013.366 with a remaining 0.002.