Let's divide 422394 by 90
Let's see how many times 90 fits into 422394.

Moving on to step 1:
If we divide 4 by 90, we get 0 and a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Append the next digit (2) from the dividend to 4 and continue with: 42 / 90

Step 2:
If we divide 42 by 90, we get 0 and a remainder of 42.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 42, we get 42.
Append the next digit (2) from the dividend to 42 and continue with: 422 / 90

Going ahead to step 3:
90 goes into 422 4 times with a remainder of 62.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
The remainder is 62 after subtracting 360 from 422.
Include the next digit (3) from the dividend after 62, then repeat: 623 / 90

On to step 4:
When dividing 623 by 90, we get 6 with a remainder of 83.
Use 6 as the next digit of our solution. 
Result so far: 46.0
Subtract 540 from 623 to get 83.
Bring next digit (9) of the dividend behind the 83 and repeat the process: 839 / 90

Step 5:
When dividing 839 by 90, we get 9 with a remainder of 29.
The number 9 becomes the next digit in our result. 
Result so far: 469.0
If we subtract 810 from 839, we get 29.
Fetch the next digit (4) from the dividend, attach it to 29 and continue: 294 / 90

Step 6:
294 divided by 90 is 3 with a remainder of 24.
Put 3 as the next digit of the answer. 
Result so far: 4693.0
If we subtract 270 from 294, we 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.

Going ahead to step 7:
90 goes into 240 2 times with a remainder of 60.
Use 2 as the next digit of our solution. 
Result so far: 4693.2
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.

On to step 8:
If we divide 600 by 90, we get 6 and a remainder of 60.
Put 6 as the next digit of the answer. 
Result so far: 4693.26
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 can be fit into 600 6 times, resulting in a remainder of 60.
The next digit of our result is 6. 
Result so far: 4693.266
Deduct 540 from 600 and we're left 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.

The final outcome is 4693.266, with a leftover of 0.006.