We're dividing 900438 by 18 
We want to figure out the number of times 900438 can be divided by 18.

Advancing to step 1:
If we divide 9 by 18, we get 0 and a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Append the next digit (0) from the dividend to 9 and continue with: 90 / 18

Step 2:
18 can be fit into 90 5 times, resulting in a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
Subtract 90 from 90 to get 0.
Bring next digit (0) of the dividend behind the 0 and repeat the process: 0 / 18

Going ahead to step 3:
If we divide 0 by 18, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 50.0
The remainder is 0 after subtracting 0 from 0.
Fetch the next digit (4) from the dividend, attach it to 0 and continue: 4 / 18

Going ahead to step 4:
18 can be fit into 4 0 times, resulting in a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 500.0
If we take 0 away from 4, we end up with 4.
Append the next digit (3) from the dividend to 4 and continue with: 43 / 18

Advancing to step 5:
The number 18 fits into 43 2 times, leaving a remainder of 7.
Use 2 as the next digit of our solution. 
Result so far: 5002.0
If we take 36 away from 43, we end up with 7.
Fetch the next digit (8) from the dividend, attach it to 7 and continue: 78 / 18

Going ahead to step 6:
If we divide 78 by 18, we get 4 and a remainder of 6.
Put 4 as the next digit of the answer. 
Result so far: 50024.0
The remainder is 6 after subtracting 72 from 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 7:
18 can be fit into 60 3 times, resulting in a remainder of 6.
Put 3 as the next digit of the answer. 
Result so far: 50024.3
If we take 54 away from 60, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 8:
18 can be fit into 60 3 times, resulting in a remainder of 6.
Write down 3 as next digit of the result. 
Result so far: 50024.33
Subtract 54 from 60 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

After the division, we end up with 50024.33 and a remainder of 0.006.