Let's divide 258440 by 3
Let's see how many times 3 fits into 258440.

Moving on to step 1:
2 divided by 3 is 0 with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Bring next digit (5) of the dividend behind the 2 and repeat the process: 25 / 3

On to step 2:
3 goes into 25 8 times with a remainder of 1.
Put 8 as the next digit of the answer. 
Result so far: 8.0
Deduct 24 from 25 and we're left with 1.
Take the next digit (8) from the dividend and append it to 1, then repeat: 18 / 3

Let's proceed to step 3:
If we divide 18 by 3, we get 6 and a remainder of 0.
The number 6 becomes the next digit in our result. 
Result so far: 86.0
If we subtract 18 from 18, we get 0.
Append the next digit (4) from the dividend to 0 and continue with: 4 / 3

Going ahead to step 4:
4 divided by 3 is 1 with a remainder of 1.
Put 1 as the next digit of the answer. 
Result so far: 861.0
Subtract 3 from 4 to get 1.
Take the next digit (4) from the dividend and append it to 1, then repeat: 14 / 3

Going ahead to step 5:
The number 3 fits into 14 4 times, leaving a remainder of 2.
Use 4 as the next digit of our solution. 
Result so far: 8614.0
If we subtract 12 from 14, we get 2.
Include the next digit (0) from the dividend after 2, then repeat: 20 / 3

Let's proceed to step 6:
3 goes into 20 6 times with a remainder of 2.
Use 6 as the next digit of our solution. 
Result so far: 86146.0
Deduct 18 from 20 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 7:
The number 3 fits into 20 6 times, leaving a remainder of 2.
Write down 6 as next digit of the result. 
Result so far: 86146.6
Deduct 18 from 20 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 8:
If we divide 20 by 3, we get 6 and a remainder of 2.
The number 6 becomes the next digit in our result. 
Result so far: 86146.66
Subtract 18 from 20 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

In conclusion, the division gives 86146.66 with a balance of 0.002.