20855793 ÷ 638 
Our goal is to divide 20855793 by 638.

Step 1:
638 goes into 2 0 times with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Fetch the next digit (0) from the dividend, attach it to 2 and continue: 20 / 638

Let's proceed to step 2:
638 goes into 20 0 times with a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 20 after subtracting 0 from 20.
Fetch the next digit (8) from the dividend, attach it to 20 and continue: 208 / 638

Let's proceed to step 3:
When dividing 208 by 638, we get 0 with a remainder of 208.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 208 to get 208.
Fetch the next digit (5) from the dividend, attach it to 208 and continue: 2085 / 638

Step 4:
The number 638 fits into 2085 3 times, leaving a remainder of 171.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
If we subtract 1914 from 2085, we get 171.
Append the next digit (5) from the dividend to 171 and continue with: 1715 / 638

Step 5:
When dividing 1715 by 638, we get 2 with a remainder of 439.
Put 2 as the next digit of the answer. 
Result so far: 32.0
If we subtract 1276 from 1715, we get 439.
Fetch the next digit (7) from the dividend, attach it to 439 and continue: 4397 / 638

Let's proceed to step 6:
638 can be fit into 4397 6 times, resulting in a remainder of 569.
The next digit of our result is 6. 
Result so far: 326.0
If we take 3828 away from 4397, we end up with 569.
Grab the next digit (9) from the dividend, add it to 569, then carry on: 5699 / 638

Going ahead to step 7:
5699 divided by 638 is 8 with a remainder of 595.
Use 8 as the next digit of our solution. 
Result so far: 3268.0
The remainder is 595 after subtracting 5104 from 5699.
Take the next digit (3) from the dividend and append it to 595, then repeat: 5953 / 638

Let's proceed to step 8:
If we divide 5953 by 638, we get 9 and a remainder of 211.
Use 9 as the next digit of our solution. 
Result so far: 32689.0
Subtract 5742 from 5953 to get 211.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2110, and continue the process.

Moving on to step 9:
638 goes into 2110 3 times with a remainder of 196.
The next digit of our result is 3. 
Result so far: 32689.3
Deduct 1914 from 2110 and we're left with 196.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1960, and continue the process.

On to step 10:
638 goes into 1960 3 times with a remainder of 46.
The next digit of our result is 3. 
Result so far: 32689.33
The remainder is 46 after subtracting 1914 from 1960.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

After the division, we end up with 32689.33 and a remainder of 0.046.