390863 divided by 30 
We want to figure out the number of times 390863 can be divided by 30.

On to step 1:
If we divide 3 by 30, we get 0 and a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 30

Let's proceed to step 2:
39 divided by 30 is 1 with a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 9 after subtracting 30 from 39.
Append the next digit (0) from the dividend to 9 and continue with: 90 / 30

Step 3:
30 can be fit into 90 3 times, resulting in a remainder of 0.
The next digit of our result is 3. 
Result so far: 13.0
Subtract 90 from 90 to get 0.
Include the next digit (8) from the dividend after 0, then repeat: 8 / 30

Let's proceed to step 4:
When dividing 8 by 30, we get 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 130.0
Subtract 0 from 8 to get 8.
Take the next digit (6) from the dividend and append it to 8, then repeat: 86 / 30

Step 5:
86 divided by 30 is 2 with a remainder of 26.
Record the quotient 2 as the next digit in the result. 
Result so far: 1302.0
Subtracting 60 from 86 leaves us with 26.
Grab the next digit (3) from the dividend, add it to 26, then carry on: 263 / 30

Advancing to step 6:
If we divide 263 by 30, we get 8 and a remainder of 23.
Put 8 as the next digit of the answer. 
Result so far: 13028.0
Deduct 240 from 263 and we're left with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Let's proceed to step 7:
230 divided by 30 is 7 with a remainder of 20.
The next digit of our result is 7. 
Result so far: 13028.7
If we subtract 210 from 230, we 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.

Going ahead to step 8:
When dividing 200 by 30, we get 6 with a remainder of 20.
Record the quotient 6 as the next digit in the result. 
Result so far: 13028.76
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.

Moving on to step 9:
30 goes into 200 6 times with a remainder of 20.
Use 6 as the next digit of our solution. 
Result so far: 13028.766
The remainder is 20 after subtracting 180 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

After the division, we end up with 13028.766 and a remainder of 0.002.