435404 ÷ 90 
Let's see how many times 90 fits into 435404.

Going ahead to step 1:
90 goes into 4 0 times with a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Include the next digit (3) from the dividend after 4, then repeat: 43 / 90

Moving on to step 2:
90 can be fit into 43 0 times, resulting in a remainder of 43.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 43 leaves us with 43.
Append the next digit (5) from the dividend to 43 and continue with: 435 / 90

On to step 3:
The number 90 fits into 435 4 times, leaving a remainder of 75.
Put 4 as the next digit of the answer. 
Result so far: 4.0
The remainder is 75 after subtracting 360 from 435.
Take the next digit (4) from the dividend and append it to 75, then repeat: 754 / 90

Moving on to step 4:
If we divide 754 by 90, we get 8 and a remainder of 34.
Write down 8 as next digit of the result. 
Result so far: 48.0
Subtracting 720 from 754 leaves us with 34.
Include the next digit (0) from the dividend after 34, then repeat: 340 / 90

On to step 5:
340 divided by 90 is 3 with a remainder of 70.
The next digit of our result is 3. 
Result so far: 483.0
Deduct 270 from 340 and we're left with 70.
Bring next digit (4) of the dividend behind the 70 and repeat the process: 704 / 90

Moving on to step 6:
If we divide 704 by 90, we get 7 and a remainder of 74.
The next digit of our result is 7. 
Result so far: 4837.0
The remainder is 74 after subtracting 630 from 704.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

On to step 7:
When dividing 740 by 90, we get 8 with a remainder of 20.
Write down 8 as next digit of the result. 
Result so far: 4837.8
The remainder is 20 after subtracting 720 from 740.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 8:
The number 90 fits into 200 2 times, leaving a remainder of 20.
Use 2 as the next digit of our solution. 
Result so far: 4837.82
If we take 180 away from 200, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 9:
200 divided by 90 is 2 with a remainder of 20.
Put 2 as the next digit of the answer. 
Result so far: 4837.822
Deduct 180 from 200 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

The final outcome is 4837.822, with a leftover of 0.002.