We look at the division of 258877 by 12 
Let's see how many times 12 fits into 258877.

Going ahead to step 1:
If we divide 2 by 12, we get 0 and a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Take the next digit (5) from the dividend and append it to 2, then repeat: 25 / 12

Let's proceed to step 2:
12 can be fit into 25 2 times, resulting in a remainder of 1.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtract 24 from 25 to get 1.
Grab the next digit (8) from the dividend, add it to 1, then carry on: 18 / 12

Moving on to step 3:
When dividing 18 by 12, we get 1 with a remainder of 6.
Use 1 as the next digit of our solution. 
Result so far: 21.0
If we subtract 12 from 18, we get 6.
Append the next digit (8) from the dividend to 6 and continue with: 68 / 12

Going ahead to step 4:
12 can be fit into 68 5 times, resulting in a remainder of 8.
Record the quotient 5 as the next digit in the result. 
Result so far: 215.0
If we subtract 60 from 68, we get 8.
Take the next digit (7) from the dividend and append it to 8, then repeat: 87 / 12

On to step 5:
12 goes into 87 7 times with a remainder of 3.
The next digit of our result is 7. 
Result so far: 2157.0
Subtract 84 from 87 to get 3.
Bring next digit (7) of the dividend behind the 3 and repeat the process: 37 / 12

Moving on to step 6:
12 goes into 37 3 times with a remainder of 1.
Write down 3 as next digit of the result. 
Result so far: 21573.0
Subtracting 36 from 37 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 7:
12 can be fit into 10 0 times, resulting in a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 21573.0
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 8:
The number 12 fits into 100 8 times, leaving a remainder of 4.
The number 8 becomes the next digit in our result. 
Result so far: 21573.08
The remainder is 4 after subtracting 96 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 9:
The number 12 fits into 40 3 times, leaving a remainder of 4.
Write down 3 as next digit of the result. 
Result so far: 21573.083
Subtracting 36 from 40 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 10:
12 can be fit into 40 3 times, resulting in a remainder of 4.
The number 3 becomes the next digit in our result. 
Result so far: 21573.0833
The remainder is 4 after subtracting 36 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Our division results in 21573.0833 with a remaining 4e-05.