521648 divided by 20 
Our goal is to divide 521648 by 20.

Let's proceed to step 1:
20 can be fit into 5 0 times, resulting in a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Take the next digit (2) from the dividend and append it to 5, then repeat: 52 / 20

Advancing to step 2:
The number 20 fits into 52 2 times, leaving a remainder of 12.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtract 40 from 52 to get 12.
Include the next digit (1) from the dividend after 12, then repeat: 121 / 20

On to step 3:
121 divided by 20 is 6 with a remainder of 1.
Use 6 as the next digit of our solution. 
Result so far: 26.0
If we take 120 away from 121, we end up with 1.
Append the next digit (6) from the dividend to 1 and continue with: 16 / 20

Step 4:
20 goes into 16 0 times with a remainder of 16.
The number 0 becomes the next digit in our result. 
Result so far: 260.0
The remainder is 16 after subtracting 0 from 16.
Append the next digit (4) from the dividend to 16 and continue with: 164 / 20

Moving on to step 5:
The number 20 fits into 164 8 times, leaving a remainder of 4.
The number 8 becomes the next digit in our result. 
Result so far: 2608.0
The remainder is 4 after subtracting 160 from 164.
Take the next digit (8) from the dividend and append it to 4, then repeat: 48 / 20

On to step 6:
20 goes into 48 2 times with a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 26082.0
If we take 40 away from 48, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 7:
80 divided by 20 is 4 with a remainder of 0.
Record the quotient 4 as the next digit in the result. 
Result so far: 26082.4
If we subtract 80 from 80, 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 8:
0 divided by 20 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 26082.4
If we subtract 0 from 0, 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.

On to step 9:
20 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 26082.4
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.

Our division results in 26082.4 with a remaining 0.0.