We're dividing 258942 by 2 
We want to divide 258942 by 2.

Let's proceed to step 1:
2 divided by 2 is 1 with a remainder of 0.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 2 from 2 to get 0.
Include the next digit (5) from the dividend after 0, then repeat: 5 / 2

Going ahead to step 2:
5 divided by 2 is 2 with a remainder of 1.
Use 2 as the next digit of our solution. 
Result so far: 12.0
If we take 4 away from 5, we end up with 1.
Append the next digit (8) from the dividend to 1 and continue with: 18 / 2

Moving on to step 3:
The number 2 fits into 18 9 times, leaving a remainder of 0.
Put 9 as the next digit of the answer. 
Result so far: 129.0
The remainder is 0 after subtracting 18 from 18.
Bring next digit (9) of the dividend behind the 0 and repeat the process: 9 / 2

Let's proceed to step 4:
The number 2 fits into 9 4 times, leaving a remainder of 1.
The next digit of our result is 4. 
Result so far: 1294.0
Subtract 8 from 9 to get 1.
Grab the next digit (4) from the dividend, add it to 1, then carry on: 14 / 2

On to step 5:
If we divide 14 by 2, we get 7 and a remainder of 0.
Put 7 as the next digit of the answer. 
Result so far: 12947.0
The remainder is 0 after subtracting 14 from 14.
Fetch the next digit (2) from the dividend, attach it to 0 and continue: 2 / 2

Moving on to step 6:
2 can be fit into 2 1 times, resulting in a remainder of 0.
Use 1 as the next digit of our solution. 
Result so far: 129471.0
If we subtract 2 from 2, 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.

On to step 7:
When dividing 0 by 2, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 129471.0
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.

Advancing to step 8:
2 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 129471.0
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.

In conclusion, the division gives 129471.0 with a balance of 0.0.