We divide 636243 by 12
We want to figure out the number of times 636243 can be divided by 12.

On to step 1:
The number 12 fits into 6 0 times, leaving a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Bring next digit (3) of the dividend behind the 6 and repeat the process: 63 / 12

On to step 2:
When dividing 63 by 12, we get 5 with a remainder of 3.
Write down 5 as next digit of the result. 
Result so far: 5.0
Deduct 60 from 63 and we're left with 3.
Bring next digit (6) of the dividend behind the 3 and repeat the process: 36 / 12

Let's proceed to step 3:
36 divided by 12 is 3 with a remainder of 0.
Use 3 as the next digit of our solution. 
Result so far: 53.0
Subtract 36 from 36 to get 0.
Bring next digit (2) of the dividend behind the 0 and repeat the process: 2 / 12

Step 4:
2 divided by 12 is 0 with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 530.0
If we subtract 0 from 2, we get 2.
Bring next digit (4) of the dividend behind the 2 and repeat the process: 24 / 12

Going ahead to step 5:
24 divided by 12 is 2 with a remainder of 0.
Put 2 as the next digit of the answer. 
Result so far: 5302.0
Subtracting 24 from 24 leaves us with 0.
Include the next digit (3) from the dividend after 0, then repeat: 3 / 12

Let's proceed to step 6:
12 goes into 3 0 times with a remainder of 3.
The next digit of our result is 0. 
Result so far: 53020.0
Subtracting 0 from 3 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 7:
When dividing 30 by 12, we get 2 with a remainder of 6.
Record the quotient 2 as the next digit in the result. 
Result so far: 53020.2
Subtracting 24 from 30 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 8:
12 goes into 60 5 times with a remainder of 0.
The next digit of our result is 5. 
Result so far: 53020.25
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.

Moving on to step 9:
The number 12 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 53020.25
The remainder is 0 after subtracting 0 from 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 10:
12 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 53020.25
Subtract 0 from 0 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.

The quotient of the division is 53020.25, and the remainder is 0.0.