We look at the division of 258860 by 42 
We're looking to find how many times 42 goes into 258860.

Going ahead to step 1:
42 goes into 2 0 times with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Grab the next digit (5) from the dividend, add it to 2, then carry on: 25 / 42

Going ahead to step 2:
The number 42 fits into 25 0 times, leaving a remainder of 25.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 25, we end up with 25.
Bring next digit (8) of the dividend behind the 25 and repeat the process: 258 / 42

Step 3:
42 can be fit into 258 6 times, resulting in a remainder of 6.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
If we subtract 252 from 258, we get 6.
Take the next digit (8) from the dividend and append it to 6, then repeat: 68 / 42

Step 4:
When dividing 68 by 42, we get 1 with a remainder of 26.
Record the quotient 1 as the next digit in the result. 
Result so far: 61.0
The remainder is 26 after subtracting 42 from 68.
Take the next digit (6) from the dividend and append it to 26, then repeat: 266 / 42

On to step 5:
266 divided by 42 is 6 with a remainder of 14.
Use 6 as the next digit of our solution. 
Result so far: 616.0
Subtracting 252 from 266 leaves us with 14.
Grab the next digit (0) from the dividend, add it to 14, then carry on: 140 / 42

Advancing to step 6:
When dividing 140 by 42, we get 3 with a remainder of 14.
Record the quotient 3 as the next digit in the result. 
Result so far: 6163.0
The remainder is 14 after subtracting 126 from 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Let's proceed to step 7:
140 divided by 42 is 3 with a remainder of 14.
Use 3 as the next digit of our solution. 
Result so far: 6163.3
The remainder is 14 after subtracting 126 from 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Moving on to step 8:
42 can be fit into 140 3 times, resulting in a remainder of 14.
Use 3 as the next digit of our solution. 
Result so far: 6163.33
Deduct 126 from 140 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

The final result is 6163.33 with a remainder of 0.014.