We divide 258446 by 12
Our goal is to divide 258446 by 12.

Moving on to step 1:
12 goes into 2 0 times with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Bring next digit (5) of the dividend behind the 2 and repeat the process: 25 / 12

Let's proceed to step 2:
25 divided by 12 is 2 with a remainder of 1.
Write down 2 as next digit of the result. 
Result so far: 2.0
Subtract 24 from 25 to get 1.
Include the next digit (8) from the dividend after 1, then repeat: 18 / 12

Advancing to step 3:
If we divide 18 by 12, we get 1 and a remainder of 6.
The next digit of our result is 1. 
Result so far: 21.0
The remainder is 6 after subtracting 12 from 18.
Append the next digit (4) from the dividend to 6 and continue with: 64 / 12

Going ahead to step 4:
64 divided by 12 is 5 with a remainder of 4.
Put 5 as the next digit of the answer. 
Result so far: 215.0
Subtracting 60 from 64 leaves us with 4.
Bring next digit (4) of the dividend behind the 4 and repeat the process: 44 / 12

Going ahead to step 5:
12 goes into 44 3 times with a remainder of 8.
Use 3 as the next digit of our solution. 
Result so far: 2153.0
Subtract 36 from 44 to get 8.
Fetch the next digit (6) from the dividend, attach it to 8 and continue: 86 / 12

Moving on to step 6:
If we divide 86 by 12, we get 7 and a remainder of 2.
The number 7 becomes the next digit in our result. 
Result so far: 21537.0
Subtract 84 from 86 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.

Step 7:
12 goes into 20 1 times with a remainder of 8.
Record the quotient 1 as the next digit in the result. 
Result so far: 21537.1
If we subtract 12 from 20, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 8:
If we divide 80 by 12, we get 6 and a remainder of 8.
Record the quotient 6 as the next digit in the result. 
Result so far: 21537.16
If we subtract 72 from 80, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 9:
If we divide 80 by 12, we get 6 and a remainder of 8.
Write down 6 as next digit of the result. 
Result so far: 21537.166
Subtract 72 from 80 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The final result is 21537.166 with a remainder of 0.0008.