We're dividing 339573 by 90 
Let's see how many times 90 fits into 339573.

Step 1:
3 divided by 90 is 0 with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Append the next digit (3) from the dividend to 3 and continue with: 33 / 90

On to step 2:
90 goes into 33 0 times with a remainder of 33.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 33 leaves us with 33.
Include the next digit (9) from the dividend after 33, then repeat: 339 / 90

Going ahead to step 3:
339 divided by 90 is 3 with a remainder of 69.
Use 3 as the next digit of our solution. 
Result so far: 3.0
The remainder is 69 after subtracting 270 from 339.
Take the next digit (5) from the dividend and append it to 69, then repeat: 695 / 90

Moving on to step 4:
695 divided by 90 is 7 with a remainder of 65.
The next digit of our result is 7. 
Result so far: 37.0
Subtracting 630 from 695 leaves us with 65.
Include the next digit (7) from the dividend after 65, then repeat: 657 / 90

Let's proceed to step 5:
If we divide 657 by 90, we get 7 and a remainder of 27.
Record the quotient 7 as the next digit in the result. 
Result so far: 377.0
Deduct 630 from 657 and we're left with 27.
Include the next digit (3) from the dividend after 27, then repeat: 273 / 90

Going ahead to step 6:
90 goes into 273 3 times with a remainder of 3.
Record the quotient 3 as the next digit in the result. 
Result so far: 3773.0
Subtracting 270 from 273 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 7:
90 can be fit into 30 0 times, resulting in a remainder of 30.
Write down 0 as next digit of the result. 
Result so far: 3773.0
The remainder is 30 after subtracting 0 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 8:
90 can be fit into 300 3 times, resulting in a remainder of 30.
Record the quotient 3 as the next digit in the result. 
Result so far: 3773.03
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.

Going ahead to step 9:
90 goes into 300 3 times with a remainder of 30.
Write down 3 as next digit of the result. 
Result so far: 3773.033
Subtracting 270 from 300 leaves us 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.

In conclusion, the division gives 3773.033 with a balance of 0.003.