665973 ÷ 12 
Our goal is to divide 665973 by 12.

On to step 1:
12 can be fit into 6 0 times, resulting in a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 12

Moving on to step 2:
The number 12 fits into 66 5 times, leaving a remainder of 6.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
If we take 60 away from 66, we end up with 6.
Take the next digit (5) from the dividend and append it to 6, then repeat: 65 / 12

Step 3:
If we divide 65 by 12, we get 5 and a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 55.0
The remainder is 5 after subtracting 60 from 65.
Take the next digit (9) from the dividend and append it to 5, then repeat: 59 / 12

Advancing to step 4:
59 divided by 12 is 4 with a remainder of 11.
Put 4 as the next digit of the answer. 
Result so far: 554.0
If we subtract 48 from 59, we get 11.
Grab the next digit (7) from the dividend, add it to 11, then carry on: 117 / 12

Step 5:
12 can be fit into 117 9 times, resulting in a remainder of 9.
Put 9 as the next digit of the answer. 
Result so far: 5549.0
Deduct 108 from 117 and we're left with 9.
Grab the next digit (3) from the dividend, add it to 9, then carry on: 93 / 12

Step 6:
93 divided by 12 is 7 with a remainder of 9.
The next digit of our result is 7. 
Result so far: 55497.0
If we subtract 84 from 93, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 7:
The number 12 fits into 90 7 times, leaving a remainder of 6.
The number 7 becomes the next digit in our result. 
Result so far: 55497.7
Subtract 84 from 90 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 8:
The number 12 fits into 60 5 times, leaving a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 55497.75
Subtracting 60 from 60 leaves us with 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:
0 divided by 12 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 55497.75
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 10:
The number 12 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 55497.75
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.

In conclusion, the division gives 55497.75 with a balance of 0.0.