664190 divided by 12 
We're looking to find how many times 12 goes into 664190.

Advancing to step 1:
When dividing 6 by 12, we get 0 with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 12

Moving on to step 2:
66 divided by 12 is 5 with a remainder of 6.
Put 5 as the next digit of the answer. 
Result so far: 5.0
Subtracting 60 from 66 leaves us with 6.
Grab the next digit (4) from the dividend, add it to 6, then carry on: 64 / 12

On to step 3:
64 divided by 12 is 5 with a remainder of 4.
The next digit of our result is 5. 
Result so far: 55.0
If we subtract 60 from 64, we get 4.
Grab the next digit (1) from the dividend, add it to 4, then carry on: 41 / 12

On to step 4:
When dividing 41 by 12, we get 3 with a remainder of 5.
The number 3 becomes the next digit in our result. 
Result so far: 553.0
Subtracting 36 from 41 leaves us with 5.
Bring next digit (9) of the dividend behind the 5 and repeat the process: 59 / 12

Going ahead to step 5:
12 can be fit into 59 4 times, resulting in a remainder of 11.
Use 4 as the next digit of our solution. 
Result so far: 5534.0
Deduct 48 from 59 and we're left with 11.
Fetch the next digit (0) from the dividend, attach it to 11 and continue: 110 / 12

Let's proceed to step 6:
If we divide 110 by 12, we get 9 and a remainder of 2.
Use 9 as the next digit of our solution. 
Result so far: 55349.0
If we take 108 away from 110, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 7:
20 divided by 12 is 1 with a remainder of 8.
Record the quotient 1 as the next digit in the result. 
Result so far: 55349.1
If we subtract 12 from 20, 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.

On to step 8:
If we divide 80 by 12, we get 6 and a remainder of 8.
Record the quotient 6 as the next digit in the result. 
Result so far: 55349.16
Subtract 72 from 80 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.

Advancing to step 9:
80 divided by 12 is 6 with a remainder of 8.
Record the quotient 6 as the next digit in the result. 
Result so far: 55349.166
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.

The final result is 55349.166 with a remainder of 0.0008.