We're dividing 21706285 by 2 
We want to divide 21706285 by 2.

Moving on to step 1:
2 can be fit into 2 1 times, resulting in a remainder of 0.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 0 after subtracting 2 from 2.
Include the next digit (1) from the dividend after 0, then repeat: 1 / 2

Let's proceed to step 2:
The number 2 fits into 1 0 times, leaving a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 10.0
Deduct 0 from 1 and we're left with 1.
Bring next digit (7) of the dividend behind the 1 and repeat the process: 17 / 2

Advancing to step 3:
The number 2 fits into 17 8 times, leaving a remainder of 1.
The next digit of our result is 8. 
Result so far: 108.0
If we take 16 away from 17, we end up with 1.
Include the next digit (0) from the dividend after 1, then repeat: 10 / 2

Moving on to step 4:
If we divide 10 by 2, we get 5 and a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 1085.0
Subtracting 10 from 10 leaves us with 0.
Take the next digit (6) from the dividend and append it to 0, then repeat: 6 / 2

Moving on to step 5:
The number 2 fits into 6 3 times, leaving a remainder of 0.
The next digit of our result is 3. 
Result so far: 10853.0
Subtracting 6 from 6 leaves us with 0.
Include the next digit (2) from the dividend after 0, then repeat: 2 / 2

Let's proceed to step 6:
2 can be fit into 2 1 times, resulting in a remainder of 0.
The next digit of our result is 1. 
Result so far: 108531.0
Subtracting 2 from 2 leaves us with 0.
Grab the next digit (8) from the dividend, add it to 0, then carry on: 8 / 2

Step 7:
8 divided by 2 is 4 with a remainder of 0.
Write down 4 as next digit of the result. 
Result so far: 1085314.0
If we subtract 8 from 8, we get 0.
Fetch the next digit (5) from the dividend, attach it to 0 and continue: 5 / 2

On to step 8:
2 can be fit into 5 2 times, resulting in a remainder of 1.
The number 2 becomes the next digit in our result. 
Result so far: 10853142.0
Subtracting 4 from 5 leaves us 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 9:
If we divide 10 by 2, we get 5 and a remainder of 0.
The next digit of our result is 5. 
Result so far: 10853142.5
If we subtract 10 from 10, 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.

Let's proceed to step 10:
When dividing 0 by 2, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 10853142.5
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 11:
2 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 10853142.5
Deduct 0 from 0 and we're left 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 10853142.5 with a remainder of 0.0.