442421 ÷ 18 
We want to figure out the number of times 442421 can be divided by 18.

Moving on to step 1:
If we divide 4 by 18, we get 0 and 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.
Take the next digit (4) from the dividend and append it to 4, then repeat: 44 / 18

Moving on to step 2:
18 can be fit into 44 2 times, resulting in a remainder of 8.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we take 36 away from 44, we end up with 8.
Grab the next digit (2) from the dividend, add it to 8, then carry on: 82 / 18

Step 3:
18 can be fit into 82 4 times, resulting in a remainder of 10.
Record the quotient 4 as the next digit in the result. 
Result so far: 24.0
Subtracting 72 from 82 leaves us with 10.
Append the next digit (4) from the dividend to 10 and continue with: 104 / 18

Advancing to step 4:
The number 18 fits into 104 5 times, leaving a remainder of 14.
Write down 5 as next digit of the result. 
Result so far: 245.0
If we take 90 away from 104, we end up with 14.
Include the next digit (2) from the dividend after 14, then repeat: 142 / 18

Step 5:
18 can be fit into 142 7 times, resulting in a remainder of 16.
Use 7 as the next digit of our solution. 
Result so far: 2457.0
If we take 126 away from 142, we end up with 16.
Grab the next digit (1) from the dividend, add it to 16, then carry on: 161 / 18

Advancing to step 6:
18 can be fit into 161 8 times, resulting in a remainder of 17.
The number 8 becomes the next digit in our result. 
Result so far: 24578.0
Subtract 144 from 161 to get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

On to step 7:
18 can be fit into 170 9 times, resulting in a remainder of 8.
Use 9 as the next digit of our solution. 
Result so far: 24578.9
If we take 162 away from 170, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 8:
The number 18 fits into 80 4 times, leaving a remainder of 8.
Record the quotient 4 as the next digit in the result. 
Result so far: 24578.94
If we subtract 72 from 80, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 9:
The number 18 fits into 80 4 times, leaving a remainder of 8.
Put 4 as the next digit of the answer. 
Result so far: 24578.944
If we subtract 72 from 80, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The final result is 24578.944 with a remainder of 0.0008.