We look at the division of 548503 by 20 
Let's see how many times 20 fits into 548503.

Step 1:
If we divide 5 by 20, we get 0 and a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Fetch the next digit (4) from the dividend, attach it to 5 and continue: 54 / 20

On to step 2:
The number 20 fits into 54 2 times, leaving a remainder of 14.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtracting 40 from 54 leaves us with 14.
Fetch the next digit (8) from the dividend, attach it to 14 and continue: 148 / 20

Advancing to step 3:
The number 20 fits into 148 7 times, leaving a remainder of 8.
Write down 7 as next digit of the result. 
Result so far: 27.0
If we subtract 140 from 148, we get 8.
Fetch the next digit (5) from the dividend, attach it to 8 and continue: 85 / 20

On to step 4:
20 can be fit into 85 4 times, resulting in a remainder of 5.
Write down 4 as next digit of the result. 
Result so far: 274.0
Deduct 80 from 85 and we're left with 5.
Grab the next digit (0) from the dividend, add it to 5, then carry on: 50 / 20

Moving on to step 5:
When dividing 50 by 20, we get 2 with a remainder of 10.
Write down 2 as next digit of the result. 
Result so far: 2742.0
Subtracting 40 from 50 leaves us with 10.
Include the next digit (3) from the dividend after 10, then repeat: 103 / 20

On to step 6:
103 divided by 20 is 5 with a remainder of 3.
The next digit of our result is 5. 
Result so far: 27425.0
The remainder is 3 after subtracting 100 from 103.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 7:
20 can be fit into 30 1 times, resulting in a remainder of 10.
Record the quotient 1 as the next digit in the result. 
Result so far: 27425.1
Subtract 20 from 30 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 8:
100 divided by 20 is 5 with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 27425.15
If we subtract 100 from 100, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 9:
20 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 27425.15
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 10:
0 divided by 20 is 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 27425.15
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 27425.15 and a remainder of 0.0.