251868 ÷ 2 
We want to divide 251868 by 2.

Let's proceed to step 1:
The number 2 fits into 2 1 times, leaving a remainder of 0.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 2 from 2 and we're left with 0.
Take the next digit (5) from the dividend and append it to 0, then repeat: 5 / 2

Step 2:
When dividing 5 by 2, we get 2 with a remainder of 1.
The next digit of our result is 2. 
Result so far: 12.0
Subtract 4 from 5 to get 1.
Fetch the next digit (1) from the dividend, attach it to 1 and continue: 11 / 2

Step 3:
2 goes into 11 5 times with a remainder of 1.
Use 5 as the next digit of our solution. 
Result so far: 125.0
Subtract 10 from 11 to get 1.
Bring next digit (8) of the dividend behind the 1 and repeat the process: 18 / 2

Advancing to step 4:
2 can be fit into 18 9 times, resulting in a remainder of 0.
Record the quotient 9 as the next digit in the result. 
Result so far: 1259.0
If we take 18 away from 18, we end up with 0.
Grab the next digit (6) from the dividend, add it to 0, then carry on: 6 / 2

Advancing to step 5:
6 divided by 2 is 3 with a remainder of 0.
The next digit of our result is 3. 
Result so far: 12593.0
Subtract 6 from 6 to get 0.
Take the next digit (8) from the dividend and append it to 0, then repeat: 8 / 2

Going ahead to step 6:
The number 2 fits into 8 4 times, leaving a remainder of 0.
The number 4 becomes the next digit in our result. 
Result so far: 125934.0
If we take 8 away from 8, 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:
When dividing 0 by 2, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 125934.0
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.

Going ahead to step 8:
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: 125934.0
Subtract 0 from 0 to 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.

After the division, we end up with 125934.0 and a remainder of 0.0.