Let's divide 249990 by 12
Let's see how many times 12 fits into 249990.

Advancing to step 1:
12 can be fit into 2 0 times, resulting in a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Grab the next digit (4) from the dividend, add it to 2, then carry on: 24 / 12

Advancing to step 2:
24 divided by 12 is 2 with a remainder of 0.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we take 24 away from 24, we end up with 0.
Bring next digit (9) of the dividend behind the 0 and repeat the process: 9 / 12

Moving on to step 3:
12 can be fit into 9 0 times, resulting in a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 20.0
Subtract 0 from 9 to get 9.
Bring next digit (9) of the dividend behind the 9 and repeat the process: 99 / 12

Going ahead to step 4:
If we divide 99 by 12, we get 8 and a remainder of 3.
Use 8 as the next digit of our solution. 
Result so far: 208.0
The remainder is 3 after subtracting 96 from 99.
Append the next digit (9) from the dividend to 3 and continue with: 39 / 12

On to step 5:
39 divided by 12 is 3 with a remainder of 3.
Record the quotient 3 as the next digit in the result. 
Result so far: 2083.0
Subtract 36 from 39 to get 3.
Grab the next digit (0) from the dividend, add it to 3, then carry on: 30 / 12

Step 6:
The number 12 fits into 30 2 times, leaving a remainder of 6.
The number 2 becomes the next digit in our result. 
Result so far: 20832.0
Subtract 24 from 30 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 7:
60 divided by 12 is 5 with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 20832.5
Subtract 60 from 60 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.

Let's proceed to step 8:
When dividing 0 by 12, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 20832.5
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.

Let's proceed to step 9:
If we divide 0 by 12, we get 0 and a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 20832.5
Subtracting 0 from 0 leaves us 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.

The final outcome is 20832.5, with a leftover of 0.0.