491869 ÷ 12 
We want to figure out the number of times 491869 can be divided by 12.

Going ahead to step 1:
The number 12 fits into 4 0 times, leaving a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Take the next digit (9) from the dividend and append it to 4, then repeat: 49 / 12

On to step 2:
49 divided by 12 is 4 with a remainder of 1.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
Subtracting 48 from 49 leaves us with 1.
Fetch the next digit (1) from the dividend, attach it to 1 and continue: 11 / 12

On to step 3:
When dividing 11 by 12, we get 0 with a remainder of 11.
Record the quotient 0 as the next digit in the result. 
Result so far: 40.0
The remainder is 11 after subtracting 0 from 11.
Bring next digit (8) of the dividend behind the 11 and repeat the process: 118 / 12

On to step 4:
118 divided by 12 is 9 with a remainder of 10.
The next digit of our result is 9. 
Result so far: 409.0
If we subtract 108 from 118, we get 10.
Fetch the next digit (6) from the dividend, attach it to 10 and continue: 106 / 12

Let's proceed to step 5:
The number 12 fits into 106 8 times, leaving a remainder of 10.
Write down 8 as next digit of the result. 
Result so far: 4098.0
Deduct 96 from 106 and we're left with 10.
Append the next digit (9) from the dividend to 10 and continue with: 109 / 12

Advancing to step 6:
12 goes into 109 9 times with a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 40989.0
Deduct 108 from 109 and we're left 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.

Step 7:
10 divided by 12 is 0 with a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 40989.0
Subtracting 0 from 10 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 8:
If we divide 100 by 12, we get 8 and a remainder of 4.
Record the quotient 8 as the next digit in the result. 
Result so far: 40989.08
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.

Going ahead to step 9:
40 divided by 12 is 3 with a remainder of 4.
The next digit of our result is 3. 
Result so far: 40989.083
Subtract 36 from 40 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 10:
40 divided by 12 is 3 with a remainder of 4.
Record the quotient 3 as the next digit in the result. 
Result so far: 40989.0833
If we take 36 away from 40, we end up 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.

The final result is 40989.0833 with a remainder of 4e-05.