We look at the division of 20550274 by 644 
Let's see how many times 644 fits into 20550274.

Going ahead to step 1:
2 divided by 644 is 0 with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Include the next digit (0) from the dividend after 2, then repeat: 20 / 644

Moving on to step 2:
644 can be fit into 20 0 times, resulting in a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 20 to get 20.
Include the next digit (5) from the dividend after 20, then repeat: 205 / 644

Step 3:
644 can be fit into 205 0 times, resulting in a remainder of 205.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 205 leaves us with 205.
Append the next digit (5) from the dividend to 205 and continue with: 2055 / 644

Advancing to step 4:
644 can be fit into 2055 3 times, resulting in a remainder of 123.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
The remainder is 123 after subtracting 1932 from 2055.
Include the next digit (0) from the dividend after 123, then repeat: 1230 / 644

Advancing to step 5:
The number 644 fits into 1230 1 times, leaving a remainder of 586.
Use 1 as the next digit of our solution. 
Result so far: 31.0
Deduct 644 from 1230 and we're left with 586.
Bring next digit (2) of the dividend behind the 586 and repeat the process: 5862 / 644

Advancing to step 6:
644 goes into 5862 9 times with a remainder of 66.
The next digit of our result is 9. 
Result so far: 319.0
Deduct 5796 from 5862 and we're left with 66.
Bring next digit (7) of the dividend behind the 66 and repeat the process: 667 / 644

Moving on to step 7:
The number 644 fits into 667 1 times, leaving a remainder of 23.
Use 1 as the next digit of our solution. 
Result so far: 3191.0
Deduct 644 from 667 and we're left with 23.
Fetch the next digit (4) from the dividend, attach it to 23 and continue: 234 / 644

Going ahead to step 8:
644 can be fit into 234 0 times, resulting in a remainder of 234.
Put 0 as the next digit of the answer. 
Result so far: 31910.0
Deduct 0 from 234 and we're left with 234.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2340, and continue the process.

Moving on to step 9:
644 goes into 2340 3 times with a remainder of 408.
Put 3 as the next digit of the answer. 
Result so far: 31910.3
If we subtract 1932 from 2340, we get 408.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4080, and continue the process.

Going ahead to step 10:
644 can be fit into 4080 6 times, resulting in a remainder of 216.
Write down 6 as next digit of the result. 
Result so far: 31910.36
If we subtract 3864 from 4080, we get 216.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

Going ahead to step 11:
The number 644 fits into 2160 3 times, leaving a remainder of 228.
The next digit of our result is 3. 
Result so far: 31910.363
Subtracting 1932 from 2160 leaves us with 228.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2280, and continue the process.

Going ahead to step 12:
644 goes into 2280 3 times with a remainder of 348.
Put 3 as the next digit of the answer. 
Result so far: 31910.3633
If we take 1932 away from 2280, we end up with 348.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3480, and continue the process.

After the division, we end up with 31910.3633 and a remainder of 0.00348.