451838 divided by 45 
Our goal is to divide 451838 by 45.

Step 1:
When dividing 4 by 45, we get 0 with 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.
Bring next digit (5) of the dividend behind the 4 and repeat the process: 45 / 45

Moving on to step 2:
45 goes into 45 1 times with a remainder of 0.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 45 from 45 and we're left with 0.
Grab the next digit (1) from the dividend, add it to 0, then carry on: 1 / 45

Let's proceed to step 3:
45 can be fit into 1 0 times, resulting in a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 10.0
Deduct 0 from 1 and we're left with 1.
Grab the next digit (8) from the dividend, add it to 1, then carry on: 18 / 45

Advancing to step 4:
18 divided by 45 is 0 with a remainder of 18.
Write down 0 as next digit of the result. 
Result so far: 100.0
Subtract 0 from 18 to get 18.
Include the next digit (3) from the dividend after 18, then repeat: 183 / 45

Step 5:
The number 45 fits into 183 4 times, leaving a remainder of 3.
Write down 4 as next digit of the result. 
Result so far: 1004.0
If we subtract 180 from 183, we get 3.
Fetch the next digit (8) from the dividend, attach it to 3 and continue: 38 / 45

Moving on to step 6:
45 goes into 38 0 times with a remainder of 38.
Record the quotient 0 as the next digit in the result. 
Result so far: 10040.0
The remainder is 38 after subtracting 0 from 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Moving on to step 7:
45 can be fit into 380 8 times, resulting in a remainder of 20.
Record the quotient 8 as the next digit in the result. 
Result so far: 10040.8
Subtract 360 from 380 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 8:
If we divide 200 by 45, we get 4 and a remainder of 20.
The number 4 becomes the next digit in our result. 
Result so far: 10040.84
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.

On to step 9:
When dividing 200 by 45, we get 4 with a remainder of 20.
Put 4 as the next digit of the answer. 
Result so far: 10040.844
Subtract 180 from 200 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

After the division, we end up with 10040.844 and a remainder of 0.002.