We're dividing 20428273 by 45 
Let's see how many times 45 fits into 20428273.

Step 1:
45 can be fit into 2 0 times, resulting in a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Fetch the next digit (0) from the dividend, attach it to 2 and continue: 20 / 45

Moving on to step 2:
45 can be fit into 20 0 times, resulting in a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 20 leaves us with 20.
Take the next digit (4) from the dividend and append it to 20, then repeat: 204 / 45

Going ahead to step 3:
If we divide 204 by 45, we get 4 and a remainder of 24.
Put 4 as the next digit of the answer. 
Result so far: 4.0
If we subtract 180 from 204, we get 24.
Bring next digit (2) of the dividend behind the 24 and repeat the process: 242 / 45

Going ahead to step 4:
If we divide 242 by 45, we get 5 and a remainder of 17.
Record the quotient 5 as the next digit in the result. 
Result so far: 45.0
Deduct 225 from 242 and we're left with 17.
Take the next digit (8) from the dividend and append it to 17, then repeat: 178 / 45

On to step 5:
45 can be fit into 178 3 times, resulting in a remainder of 43.
Write down 3 as next digit of the result. 
Result so far: 453.0
Deduct 135 from 178 and we're left with 43.
Append the next digit (2) from the dividend to 43 and continue with: 432 / 45

Step 6:
The number 45 fits into 432 9 times, leaving a remainder of 27.
Record the quotient 9 as the next digit in the result. 
Result so far: 4539.0
Subtract 405 from 432 to get 27.
Bring next digit (7) of the dividend behind the 27 and repeat the process: 277 / 45

Advancing to step 7:
277 divided by 45 is 6 with a remainder of 7.
Put 6 as the next digit of the answer. 
Result so far: 45396.0
If we subtract 270 from 277, we get 7.
Grab the next digit (3) from the dividend, add it to 7, then carry on: 73 / 45

Let's proceed to step 8:
When dividing 73 by 45, we get 1 with a remainder of 28.
Record the quotient 1 as the next digit in the result. 
Result so far: 453961.0
Subtracting 45 from 73 leaves us with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Going ahead to step 9:
45 goes into 280 6 times with a remainder of 10.
Write down 6 as next digit of the result. 
Result so far: 453961.6
Subtracting 270 from 280 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 10:
When dividing 100 by 45, we get 2 with a remainder of 10.
The number 2 becomes the next digit in our result. 
Result so far: 453961.62
Subtracting 90 from 100 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 11:
45 goes into 100 2 times with a remainder of 10.
Use 2 as the next digit of our solution. 
Result so far: 453961.622
Deduct 90 from 100 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

After the division, we end up with 453961.622 and a remainder of 0.001.