Let's divide 128578 by 30
We want to figure out the number of times 128578 can be divided by 30.

Moving on to step 1:
The number 30 fits into 1 0 times, leaving a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Bring next digit (2) of the dividend behind the 1 and repeat the process: 12 / 30

Advancing to step 2:
When dividing 12 by 30, we get 0 with a remainder of 12.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 12 to get 12.
Append the next digit (8) from the dividend to 12 and continue with: 128 / 30

On to step 3:
128 divided by 30 is 4 with a remainder of 8.
Write down 4 as next digit of the result. 
Result so far: 4.0
The remainder is 8 after subtracting 120 from 128.
Take the next digit (5) from the dividend and append it to 8, then repeat: 85 / 30

Let's proceed to step 4:
30 goes into 85 2 times with a remainder of 25.
Write down 2 as next digit of the result. 
Result so far: 42.0
The remainder is 25 after subtracting 60 from 85.
Fetch the next digit (7) from the dividend, attach it to 25 and continue: 257 / 30

Going ahead to step 5:
When dividing 257 by 30, we get 8 with a remainder of 17.
Record the quotient 8 as the next digit in the result. 
Result so far: 428.0
Subtract 240 from 257 to get 17.
Fetch the next digit (8) from the dividend, attach it to 17 and continue: 178 / 30

Going ahead to step 6:
30 goes into 178 5 times with a remainder of 28.
Use 5 as the next digit of our solution. 
Result so far: 4285.0
Deduct 150 from 178 and we're left with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

On to step 7:
280 divided by 30 is 9 with a remainder of 10.
The next digit of our result is 9. 
Result so far: 4285.9
The remainder is 10 after subtracting 270 from 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to 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: 4285.93
Deduct 90 from 100 and we're left 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.

Moving on to step 9:
100 divided by 30 is 3 with a remainder of 10.
The next digit of our result is 3. 
Result so far: 4285.933
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.

After the division, we end up with 4285.933 and a remainder of 0.001.