We look at the division of 10510066 by 12 
Our goal is to divide 10510066 by 12.

Let's proceed to step 1:
If we divide 1 by 12, we get 0 and a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Grab the next digit (0) from the dividend, add it to 1, then carry on: 10 / 12

Step 2:
12 can be fit into 10 0 times, resulting in a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 10 after subtracting 0 from 10.
Append the next digit (5) from the dividend to 10 and continue with: 105 / 12

Going ahead to step 3:
If we divide 105 by 12, we get 8 and a remainder of 9.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
Subtracting 96 from 105 leaves us with 9.
Bring next digit (1) of the dividend behind the 9 and repeat the process: 91 / 12

Going ahead to step 4:
If we divide 91 by 12, we get 7 and a remainder of 7.
The number 7 becomes the next digit in our result. 
Result so far: 87.0
The remainder is 7 after subtracting 84 from 91.
Bring next digit (0) of the dividend behind the 7 and repeat the process: 70 / 12

On to step 5:
12 goes into 70 5 times with a remainder of 10.
Use 5 as the next digit of our solution. 
Result so far: 875.0
If we take 60 away from 70, we end up with 10.
Bring next digit (0) of the dividend behind the 10 and repeat the process: 100 / 12

On to step 6:
100 divided by 12 is 8 with a remainder of 4.
Use 8 as the next digit of our solution. 
Result so far: 8758.0
Deduct 96 from 100 and we're left with 4.
Bring next digit (6) of the dividend behind the 4 and repeat the process: 46 / 12

Advancing to step 7:
46 divided by 12 is 3 with a remainder of 10.
The next digit of our result is 3. 
Result so far: 87583.0
Subtract 36 from 46 to get 10.
Grab the next digit (6) from the dividend, add it to 10, then carry on: 106 / 12

Advancing to step 8:
12 can be fit into 106 8 times, resulting in a remainder of 10.
Use 8 as the next digit of our solution. 
Result so far: 875838.0
Subtract 96 from 106 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 9:
12 can be fit into 100 8 times, resulting in a remainder of 4.
Use 8 as the next digit of our solution. 
Result so far: 875838.8
If we subtract 96 from 100, we 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.

Step 10:
The number 12 fits into 40 3 times, leaving a remainder of 4.
Record the quotient 3 as the next digit in the result. 
Result so far: 875838.83
Deduct 36 from 40 and we're left 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.

Step 11:
12 can be fit into 40 3 times, resulting in a remainder of 4.
Put 3 as the next digit of the answer. 
Result so far: 875838.833
Subtracting 36 from 40 leaves us 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.

In conclusion, the division gives 875838.833 with a balance of 0.0004.