We divide 392937 by 90
We want to figure out the number of times 392937 can be divided by 90.

Moving on to step 1:
If we divide 3 by 90, we get 0 and a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 90

Going ahead to step 2:
39 divided by 90 is 0 with a remainder of 39.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 39 after subtracting 0 from 39.
Grab the next digit (2) from the dividend, add it to 39, then carry on: 392 / 90

Going ahead to step 3:
If we divide 392 by 90, we get 4 and a remainder of 32.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
If we take 360 away from 392, we end up with 32.
Grab the next digit (9) from the dividend, add it to 32, then carry on: 329 / 90

Step 4:
The number 90 fits into 329 3 times, leaving a remainder of 59.
Use 3 as the next digit of our solution. 
Result so far: 43.0
The remainder is 59 after subtracting 270 from 329.
Grab the next digit (3) from the dividend, add it to 59, then carry on: 593 / 90

Step 5:
593 divided by 90 is 6 with a remainder of 53.
Write down 6 as next digit of the result. 
Result so far: 436.0
The remainder is 53 after subtracting 540 from 593.
Include the next digit (7) from the dividend after 53, then repeat: 537 / 90

Advancing to step 6:
90 can be fit into 537 5 times, resulting in a remainder of 87.
Put 5 as the next digit of the answer. 
Result so far: 4365.0
Deduct 450 from 537 and we're left with 87.
Since there are no more digits in the dividend, we add a zero to the remainder making it 870, and continue the process.

On to step 7:
90 goes into 870 9 times with a remainder of 60.
Write down 9 as next digit of the result. 
Result so far: 4365.9
Subtract 810 from 870 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

On to step 8:
600 divided by 90 is 6 with a remainder of 60.
Write down 6 as next digit of the result. 
Result so far: 4365.96
The remainder is 60 after subtracting 540 from 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

On to step 9:
The number 90 fits into 600 6 times, leaving a remainder of 60.
The next digit of our result is 6. 
Result so far: 4365.966
Subtract 540 from 600 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

In conclusion, the division gives 4365.966 with a balance of 0.006.