We look at the division of 10580551 by 20 
Let's see how many times 20 fits into 10580551.

Moving on to step 1:
When dividing 1 by 20, we get 0 with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Take the next digit (0) from the dividend and append it to 1, then repeat: 10 / 20

Let's proceed to step 2:
The number 20 fits into 10 0 times, leaving a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 10, we get 10.
Bring next digit (5) of the dividend behind the 10 and repeat the process: 105 / 20

Let's proceed to step 3:
20 goes into 105 5 times with a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 5.0
Subtracting 100 from 105 leaves us with 5.
Fetch the next digit (8) from the dividend, attach it to 5 and continue: 58 / 20

Let's proceed to step 4:
The number 20 fits into 58 2 times, leaving a remainder of 18.
Record the quotient 2 as the next digit in the result. 
Result so far: 52.0
Subtract 40 from 58 to get 18.
Fetch the next digit (0) from the dividend, attach it to 18 and continue: 180 / 20

Moving on to step 5:
180 divided by 20 is 9 with a remainder of 0.
Use 9 as the next digit of our solution. 
Result so far: 529.0
If we take 180 away from 180, we end up with 0.
Bring next digit (5) of the dividend behind the 0 and repeat the process: 5 / 20

Going ahead to step 6:
When dividing 5 by 20, we get 0 with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 5290.0
Subtracting 0 from 5 leaves us with 5.
Take the next digit (5) from the dividend and append it to 5, then repeat: 55 / 20

Let's proceed to step 7:
When dividing 55 by 20, we get 2 with a remainder of 15.
Write down 2 as next digit of the result. 
Result so far: 52902.0
Subtracting 40 from 55 leaves us with 15.
Fetch the next digit (1) from the dividend, attach it to 15 and continue: 151 / 20

Advancing to step 8:
20 can be fit into 151 7 times, resulting in a remainder of 11.
Use 7 as the next digit of our solution. 
Result so far: 529027.0
The remainder is 11 after subtracting 140 from 151.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Moving on to step 9:
110 divided by 20 is 5 with a remainder of 10.
Write down 5 as next digit of the result. 
Result so far: 529027.5
The remainder is 10 after subtracting 100 from 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 10:
20 can be fit into 100 5 times, resulting in a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 529027.55
Subtracting 100 from 100 leaves us 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.

The final result is 529027.55 with a remainder of 0.0.