We're dividing 550555 by 45 
We want to divide 550555 by 45.

Let's proceed to step 1:
The number 45 fits into 5 0 times, leaving a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Grab the next digit (5) from the dividend, add it to 5, then carry on: 55 / 45

Advancing to step 2:
When dividing 55 by 45, we get 1 with a remainder of 10.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 45 from 55, we get 10.
Bring next digit (0) of the dividend behind the 10 and repeat the process: 100 / 45

Step 3:
45 can be fit into 100 2 times, resulting in a remainder of 10.
Put 2 as the next digit of the answer. 
Result so far: 12.0
The remainder is 10 after subtracting 90 from 100.
Fetch the next digit (5) from the dividend, attach it to 10 and continue: 105 / 45

On to step 4:
45 can be fit into 105 2 times, resulting in a remainder of 15.
Record the quotient 2 as the next digit in the result. 
Result so far: 122.0
Subtracting 90 from 105 leaves us with 15.
Fetch the next digit (5) from the dividend, attach it to 15 and continue: 155 / 45

Let's proceed to step 5:
45 can be fit into 155 3 times, resulting in a remainder of 20.
The number 3 becomes the next digit in our result. 
Result so far: 1223.0
The remainder is 20 after subtracting 135 from 155.
Bring next digit (5) of the dividend behind the 20 and repeat the process: 205 / 45

Going ahead to step 6:
If we divide 205 by 45, we get 4 and a remainder of 25.
Record the quotient 4 as the next digit in the result. 
Result so far: 12234.0
If we take 180 away from 205, we end up with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Moving on to step 7:
If we divide 250 by 45, we get 5 and a remainder of 25.
Write down 5 as next digit of the result. 
Result so far: 12234.5
If we take 225 away from 250, we end up with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

On to step 8:
45 goes into 250 5 times with a remainder of 25.
Write down 5 as next digit of the result. 
Result so far: 12234.55
Subtracting 225 from 250 leaves us with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Our division results in 12234.55 with a remaining 0.025.