80186138 divided by 12 
Our goal is to divide 80186138 by 12.

Moving on to step 1:
The number 12 fits into 8 0 times, leaving a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Append the next digit (0) from the dividend to 8 and continue with: 80 / 12

On to step 2:
When dividing 80 by 12, we get 6 with a remainder of 8.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
Subtract 72 from 80 to get 8.
Fetch the next digit (1) from the dividend, attach it to 8 and continue: 81 / 12

Advancing to step 3:
12 goes into 81 6 times with a remainder of 9.
The number 6 becomes the next digit in our result. 
Result so far: 66.0
If we subtract 72 from 81, we get 9.
Grab the next digit (8) from the dividend, add it to 9, then carry on: 98 / 12

Let's proceed to step 4:
98 divided by 12 is 8 with a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 668.0
Subtract 96 from 98 to get 2.
Fetch the next digit (6) from the dividend, attach it to 2 and continue: 26 / 12

Advancing to step 5:
12 goes into 26 2 times with a remainder of 2.
The number 2 becomes the next digit in our result. 
Result so far: 6682.0
Subtract 24 from 26 to get 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 12

Going ahead to step 6:
12 can be fit into 21 1 times, resulting in a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 66821.0
If we subtract 12 from 21, we get 9.
Fetch the next digit (3) from the dividend, attach it to 9 and continue: 93 / 12

Step 7:
93 divided by 12 is 7 with a remainder of 9.
The number 7 becomes the next digit in our result. 
Result so far: 668217.0
If we subtract 84 from 93, we get 9.
Include the next digit (8) from the dividend after 9, then repeat: 98 / 12

Step 8:
The number 12 fits into 98 8 times, leaving a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 6682178.0
Subtracting 96 from 98 leaves us 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.

Step 9:
12 goes into 20 1 times with a remainder of 8.
Use 1 as the next digit of our solution. 
Result so far: 6682178.1
If we take 12 away from 20, we end up with 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 10:
12 can be fit into 80 6 times, resulting in a remainder of 8.
The number 6 becomes the next digit in our result. 
Result so far: 6682178.16
Subtracting 72 from 80 leaves us with 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 11:
12 goes into 80 6 times with a remainder of 8.
The next digit of our result is 6. 
Result so far: 6682178.166
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 quotient of the division is 6682178.166, and the remainder is 0.0008.