Let's divide 409302 by 90
Let's see how many times 90 fits into 409302.

Going ahead to step 1:
4 divided by 90 is 0 with a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Take the next digit (0) from the dividend and append it to 4, then repeat: 40 / 90

Moving on to step 2:
90 goes into 40 0 times with a remainder of 40.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 40 to get 40.
Fetch the next digit (9) from the dividend, attach it to 40 and continue: 409 / 90

Advancing to step 3:
If we divide 409 by 90, we get 4 and a remainder of 49.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
The remainder is 49 after subtracting 360 from 409.
Bring next digit (3) of the dividend behind the 49 and repeat the process: 493 / 90

Advancing to step 4:
90 goes into 493 5 times with a remainder of 43.
Record the quotient 5 as the next digit in the result. 
Result so far: 45.0
Deduct 450 from 493 and we're left with 43.
Fetch the next digit (0) from the dividend, attach it to 43 and continue: 430 / 90

Moving on to step 5:
90 goes into 430 4 times with a remainder of 70.
Use 4 as the next digit of our solution. 
Result so far: 454.0
Subtracting 360 from 430 leaves us with 70.
Include the next digit (2) from the dividend after 70, then repeat: 702 / 90

Going ahead to step 6:
If we divide 702 by 90, we get 7 and a remainder of 72.
Record the quotient 7 as the next digit in the result. 
Result so far: 4547.0
Subtract 630 from 702 to get 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Going ahead to step 7:
If we divide 720 by 90, we get 8 and a remainder of 0.
The number 8 becomes the next digit in our result. 
Result so far: 4547.8
Subtracting 720 from 720 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 8:
0 divided by 90 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 4547.8
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 9:
The number 90 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 4547.8
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 4547.8, with a leftover of 0.0.