We're dividing 126873 by 3 
We want to divide 126873 by 3.

Moving on to step 1:
If we divide 1 by 3, we get 0 and a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Include the next digit (2) from the dividend after 1, then repeat: 12 / 3

Moving on to step 2:
The number 3 fits into 12 4 times, leaving a remainder of 0.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Deduct 12 from 12 and we're left with 0.
Fetch the next digit (6) from the dividend, attach it to 0 and continue: 6 / 3

Let's proceed to step 3:
The number 3 fits into 6 2 times, leaving a remainder of 0.
Put 2 as the next digit of the answer. 
Result so far: 42.0
The remainder is 0 after subtracting 6 from 6.
Fetch the next digit (8) from the dividend, attach it to 0 and continue: 8 / 3

Moving on to step 4:
3 can be fit into 8 2 times, resulting in a remainder of 2.
Put 2 as the next digit of the answer. 
Result so far: 422.0
If we take 6 away from 8, we end up with 2.
Include the next digit (7) from the dividend after 2, then repeat: 27 / 3

Moving on to step 5:
27 divided by 3 is 9 with a remainder of 0.
Write down 9 as next digit of the result. 
Result so far: 4229.0
Subtracting 27 from 27 leaves us with 0.
Take the next digit (3) from the dividend and append it to 0, then repeat: 3 / 3

On to step 6:
The number 3 fits into 3 1 times, leaving a remainder of 0.
Write down 1 as next digit of the result. 
Result so far: 42291.0
If we subtract 3 from 3, 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.

Step 7:
When dividing 0 by 3, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 42291.0
If we take 0 away from 0, 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.

Advancing to step 8:
3 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 42291.0
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 42291.0 with a balance of 0.0.