458394 ÷ 90 
We want to figure out the number of times 458394 can be divided by 90.

Step 1:
The number 90 fits into 4 0 times, leaving a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Include the next digit (5) from the dividend after 4, then repeat: 45 / 90

Advancing to step 2:
The number 90 fits into 45 0 times, leaving a remainder of 45.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 45 and we're left with 45.
Include the next digit (8) from the dividend after 45, then repeat: 458 / 90

Going ahead to step 3:
90 goes into 458 5 times with a remainder of 8.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
The remainder is 8 after subtracting 450 from 458.
Grab the next digit (3) from the dividend, add it to 8, then carry on: 83 / 90

Going ahead to step 4:
90 goes into 83 0 times with a remainder of 83.
Use 0 as the next digit of our solution. 
Result so far: 50.0
The remainder is 83 after subtracting 0 from 83.
Append the next digit (9) from the dividend to 83 and continue with: 839 / 90

Moving on to step 5:
839 divided by 90 is 9 with a remainder of 29.
The next digit of our result is 9. 
Result so far: 509.0
Subtracting 810 from 839 leaves us with 29.
Include the next digit (4) from the dividend after 29, then repeat: 294 / 90

Let's proceed to step 6:
When dividing 294 by 90, we get 3 with a remainder of 24.
The next digit of our result is 3. 
Result so far: 5093.0
Subtract 270 from 294 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Step 7:
If we divide 240 by 90, we get 2 and a remainder of 60.
Put 2 as the next digit of the answer. 
Result so far: 5093.2
If we subtract 180 from 240, we 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.

Moving on to step 8:
The number 90 fits into 600 6 times, leaving a remainder of 60.
Record the quotient 6 as the next digit in the result. 
Result so far: 5093.26
Subtracting 540 from 600 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Let's proceed to step 9:
90 goes into 600 6 times with a remainder of 60.
The next digit of our result is 6. 
Result so far: 5093.266
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 5093.266 with a balance of 0.006.