We're dividing 516021 by 2 
Our goal is to divide 516021 by 2.

Moving on to step 1:
If we divide 5 by 2, we get 2 and a remainder of 1.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
The remainder is 1 after subtracting 4 from 5.
Include the next digit (1) from the dividend after 1, then repeat: 11 / 2

Advancing to step 2:
The number 2 fits into 11 5 times, leaving a remainder of 1.
Record the quotient 5 as the next digit in the result. 
Result so far: 25.0
Subtracting 10 from 11 leaves us with 1.
Include the next digit (6) from the dividend after 1, then repeat: 16 / 2

Step 3:
16 divided by 2 is 8 with a remainder of 0.
Record the quotient 8 as the next digit in the result. 
Result so far: 258.0
Subtract 16 from 16 to get 0.
Take the next digit (0) from the dividend and append it to 0, then repeat: 0 / 2

Step 4:
The number 2 fits into 0 0 times, leaving a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 2580.0
The remainder is 0 after subtracting 0 from 0.
Fetch the next digit (2) from the dividend, attach it to 0 and continue: 2 / 2

Advancing to step 5:
2 goes into 2 1 times with a remainder of 0.
Write down 1 as next digit of the result. 
Result so far: 25801.0
Subtracting 2 from 2 leaves us with 0.
Take the next digit (1) from the dividend and append it to 0, then repeat: 1 / 2

Let's proceed to step 6:
2 can be fit into 1 0 times, resulting in a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 258010.0
If we take 0 away from 1, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 7:
2 goes into 10 5 times with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 258010.5
The remainder is 0 after subtracting 10 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 8:
If we divide 0 by 2, we get 0 and a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 258010.5
Subtracting 0 from 0 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.

Step 9:
2 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 258010.5
Subtracting 0 from 0 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 quotient of the division is 258010.5, and the remainder is 0.0.