199912 ÷ 2 
We want to figure out the number of times 199912 can be divided by 2.

Step 1:
If we divide 1 by 2, we get 0 and a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Append the next digit (9) from the dividend to 1 and continue with: 19 / 2

Going ahead to step 2:
2 goes into 19 9 times with a remainder of 1.
Use 9 as the next digit of our solution. 
Result so far: 9.0
Subtract 18 from 19 to get 1.
Fetch the next digit (9) from the dividend, attach it to 1 and continue: 19 / 2

Advancing to step 3:
When dividing 19 by 2, we get 9 with a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 99.0
Subtracting 18 from 19 leaves us with 1.
Include the next digit (9) from the dividend after 1, then repeat: 19 / 2

Let's proceed to step 4:
2 goes into 19 9 times with a remainder of 1.
Use 9 as the next digit of our solution. 
Result so far: 999.0
Subtract 18 from 19 to get 1.
Take the next digit (1) from the dividend and append it to 1, then repeat: 11 / 2

Going ahead to step 5:
When dividing 11 by 2, we get 5 with a remainder of 1.
Record the quotient 5 as the next digit in the result. 
Result so far: 9995.0
Deduct 10 from 11 and we're left with 1.
Append the next digit (2) from the dividend to 1 and continue with: 12 / 2

Let's proceed to step 6:
When dividing 12 by 2, we get 6 with a remainder of 0.
Write down 6 as next digit of the result. 
Result so far: 99956.0
If we take 12 away from 12, 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.

Step 7:
If we divide 0 by 2, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 99956.0
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.

On to step 8:
When dividing 0 by 2, we get 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 99956.0
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.

In conclusion, the division gives 99956.0 with a balance of 0.0.