We look at the division of 422516 by 12 
Let's see how many times 12 fits into 422516.

Step 1:
4 divided by 12 is 0 with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Grab the next digit (2) from the dividend, add it to 4, then carry on: 42 / 12

Let's proceed to step 2:
12 can be fit into 42 3 times, resulting in a remainder of 6.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
The remainder is 6 after subtracting 36 from 42.
Include the next digit (2) from the dividend after 6, then repeat: 62 / 12

On to step 3:
When dividing 62 by 12, we get 5 with a remainder of 2.
The number 5 becomes the next digit in our result. 
Result so far: 35.0
If we subtract 60 from 62, we get 2.
Fetch the next digit (5) from the dividend, attach it to 2 and continue: 25 / 12

Step 4:
The number 12 fits into 25 2 times, leaving a remainder of 1.
Put 2 as the next digit of the answer. 
Result so far: 352.0
If we subtract 24 from 25, we get 1.
Grab the next digit (1) from the dividend, add it to 1, then carry on: 11 / 12

Moving on to step 5:
If we divide 11 by 12, we get 0 and a remainder of 11.
The number 0 becomes the next digit in our result. 
Result so far: 3520.0
If we take 0 away from 11, we end up with 11.
Take the next digit (6) from the dividend and append it to 11, then repeat: 116 / 12

Going ahead to step 6:
12 goes into 116 9 times with a remainder of 8.
Put 9 as the next digit of the answer. 
Result so far: 35209.0
Subtract 108 from 116 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.

On to step 7:
When dividing 80 by 12, we get 6 with a remainder of 8.
Use 6 as the next digit of our solution. 
Result so far: 35209.6
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.

Step 8:
12 can be fit into 80 6 times, resulting in a remainder of 8.
Record the quotient 6 as the next digit in the result. 
Result so far: 35209.66
The remainder is 8 after subtracting 72 from 80.
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 outcome is 35209.66, with a leftover of 0.008.