We divide 391303 by 90
Our goal is to divide 391303 by 90.

Moving on to step 1:
90 goes into 3 0 times with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Bring next digit (9) of the dividend behind the 3 and repeat the process: 39 / 90

On to step 2:
When dividing 39 by 90, we get 0 with a remainder of 39.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 39 to get 39.
Include the next digit (1) from the dividend after 39, then repeat: 391 / 90

On to step 3:
The number 90 fits into 391 4 times, leaving a remainder of 31.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Subtracting 360 from 391 leaves us with 31.
Take the next digit (3) from the dividend and append it to 31, then repeat: 313 / 90

Moving on to step 4:
When dividing 313 by 90, we get 3 with a remainder of 43.
The next digit of our result is 3. 
Result so far: 43.0
Subtract 270 from 313 to get 43.
Bring next digit (0) of the dividend behind the 43 and repeat the process: 430 / 90

Going ahead to step 5:
The number 90 fits into 430 4 times, leaving a remainder of 70.
Put 4 as the next digit of the answer. 
Result so far: 434.0
Subtracting 360 from 430 leaves us with 70.
Take the next digit (3) from the dividend and append it to 70, then repeat: 703 / 90

Let's proceed to step 6:
The number 90 fits into 703 7 times, leaving a remainder of 73.
Use 7 as the next digit of our solution. 
Result so far: 4347.0
Subtracting 630 from 703 leaves us with 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Going ahead to step 7:
90 can be fit into 730 8 times, resulting in a remainder of 10.
Record the quotient 8 as the next digit in the result. 
Result so far: 4347.8
Subtract 720 from 730 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 8:
When dividing 100 by 90, we get 1 with a remainder of 10.
The number 1 becomes the next digit in our result. 
Result so far: 4347.81
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.

Advancing to step 9:
90 goes into 100 1 times with a remainder of 10.
Write down 1 as next digit of the result. 
Result so far: 4347.811
Subtracting 90 from 100 leaves us 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.

Our division results in 4347.811 with a remaining 0.001.