455865 ÷ 12 
We want to figure out the number of times 455865 can be divided by 12.

Let's proceed to step 1:
12 goes into 4 0 times with a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Grab the next digit (5) from the dividend, add it to 4, then carry on: 45 / 12

Let's proceed to step 2:
The number 12 fits into 45 3 times, leaving a remainder of 9.
Write down 3 as next digit of the result. 
Result so far: 3.0
Subtract 36 from 45 to get 9.
Grab the next digit (5) from the dividend, add it to 9, then carry on: 95 / 12

On to step 3:
The number 12 fits into 95 7 times, leaving a remainder of 11.
The number 7 becomes the next digit in our result. 
Result so far: 37.0
Subtracting 84 from 95 leaves us with 11.
Include the next digit (8) from the dividend after 11, then repeat: 118 / 12

On to step 4:
When dividing 118 by 12, we get 9 with a remainder of 10.
The number 9 becomes the next digit in our result. 
Result so far: 379.0
Subtract 108 from 118 to get 10.
Take the next digit (6) from the dividend and append it to 10, then repeat: 106 / 12

On to step 5:
If we divide 106 by 12, we get 8 and a remainder of 10.
Use 8 as the next digit of our solution. 
Result so far: 3798.0
Subtract 96 from 106 to get 10.
Bring next digit (5) of the dividend behind the 10 and repeat the process: 105 / 12

On to step 6:
When dividing 105 by 12, we get 8 with a remainder of 9.
The next digit of our result is 8. 
Result so far: 37988.0
The remainder is 9 after subtracting 96 from 105.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 7:
12 can be fit into 90 7 times, resulting in a remainder of 6.
Use 7 as the next digit of our solution. 
Result so far: 37988.7
Subtracting 84 from 90 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.

Advancing to step 8:
12 goes into 60 5 times with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 37988.75
If we subtract 60 from 60, we 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.

Step 9:
The number 12 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 37988.75
If we subtract 0 from 0, we 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.

On to step 10:
When dividing 0 by 12, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 37988.75
If we subtract 0 from 0, we 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 final result is 37988.75 with a remainder of 0.0.