Let's divide 30866 by 90
We want to figure out the number of times 30866 can be divided by 90.

On to step 1:
The number 90 fits into 3 0 times, leaving a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Grab the next digit (0) from the dividend, add it to 3, then carry on: 30 / 90

Step 2:
90 goes into 30 0 times with a remainder of 30.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 30 leaves us with 30.
Include the next digit (8) from the dividend after 30, then repeat: 308 / 90

On to step 3:
The number 90 fits into 308 3 times, leaving a remainder of 38.
The next digit of our result is 3. 
Result so far: 3.0
Subtracting 270 from 308 leaves us with 38.
Include the next digit (6) from the dividend after 38, then repeat: 386 / 90

Going ahead to step 4:
90 can be fit into 386 4 times, resulting in a remainder of 26.
Record the quotient 4 as the next digit in the result. 
Result so far: 34.0
Deduct 360 from 386 and we're left with 26.
Include the next digit (6) from the dividend after 26, then repeat: 266 / 90

Going ahead to step 5:
90 goes into 266 2 times with a remainder of 86.
Record the quotient 2 as the next digit in the result. 
Result so far: 342.0
The remainder is 86 after subtracting 180 from 266.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

Moving on to step 6:
860 divided by 90 is 9 with a remainder of 50.
Put 9 as the next digit of the answer. 
Result so far: 342.9
Subtract 810 from 860 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

On to step 7:
90 can be fit into 500 5 times, resulting in a remainder of 50.
Use 5 as the next digit of our solution. 
Result so far: 342.95
If we subtract 450 from 500, we get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Moving on to step 8:
90 goes into 500 5 times with a remainder of 50.
Use 5 as the next digit of our solution. 
Result so far: 342.955
If we subtract 450 from 500, we get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

In conclusion, the division gives 342.955 with a balance of 0.005.