We divide 303942 by 90
We're looking to find how many times 90 goes into 303942.

On to step 1:
90 goes into 3 0 times with a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Take the next digit (0) from the dividend and append it to 3, then repeat: 30 / 90

Going ahead to step 2:
If we divide 30 by 90, we get 0 and a remainder of 30.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 30, we end up with 30.
Fetch the next digit (3) from the dividend, attach it to 30 and continue: 303 / 90

Going ahead to step 3:
90 can be fit into 303 3 times, resulting in a remainder of 33.
Put 3 as the next digit of the answer. 
Result so far: 3.0
If we subtract 270 from 303, we get 33.
Grab the next digit (9) from the dividend, add it to 33, then carry on: 339 / 90

Advancing to step 4:
90 goes into 339 3 times with a remainder of 69.
Put 3 as the next digit of the answer. 
Result so far: 33.0
If we subtract 270 from 339, we get 69.
Grab the next digit (4) from the dividend, add it to 69, then carry on: 694 / 90

Going ahead to step 5:
90 can be fit into 694 7 times, resulting in a remainder of 64.
Use 7 as the next digit of our solution. 
Result so far: 337.0
Deduct 630 from 694 and we're left with 64.
Include the next digit (2) from the dividend after 64, then repeat: 642 / 90

Let's proceed to step 6:
90 goes into 642 7 times with a remainder of 12.
The next digit of our result is 7. 
Result so far: 3377.0
If we take 630 away from 642, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 7:
If we divide 120 by 90, we get 1 and a remainder of 30.
Use 1 as the next digit of our solution. 
Result so far: 3377.1
Deduct 90 from 120 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 8:
90 goes into 300 3 times with a remainder of 30.
The number 3 becomes the next digit in our result. 
Result so far: 3377.13
If we take 270 away from 300, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 9:
90 can be fit into 300 3 times, resulting in a remainder of 30.
The next digit of our result is 3. 
Result so far: 3377.133
The remainder is 30 after subtracting 270 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

In conclusion, the division gives 3377.133 with a balance of 0.003.