78919124 divided by 12 
We want to figure out the number of times 78919124 can be divided by 12.

Step 1:
12 goes into 7 0 times with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Include the next digit (8) from the dividend after 7, then repeat: 78 / 12

Going ahead to step 2:
12 can be fit into 78 6 times, resulting in a remainder of 6.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
Subtracting 72 from 78 leaves us with 6.
Fetch the next digit (9) from the dividend, attach it to 6 and continue: 69 / 12

Advancing to step 3:
12 goes into 69 5 times with a remainder of 9.
Use 5 as the next digit of our solution. 
Result so far: 65.0
Subtracting 60 from 69 leaves us with 9.
Fetch the next digit (1) from the dividend, attach it to 9 and continue: 91 / 12

Step 4:
12 can be fit into 91 7 times, resulting in a remainder of 7.
Record the quotient 7 as the next digit in the result. 
Result so far: 657.0
Subtract 84 from 91 to get 7.
Fetch the next digit (9) from the dividend, attach it to 7 and continue: 79 / 12

Advancing to step 5:
The number 12 fits into 79 6 times, leaving a remainder of 7.
Use 6 as the next digit of our solution. 
Result so far: 6576.0
The remainder is 7 after subtracting 72 from 79.
Take the next digit (1) from the dividend and append it to 7, then repeat: 71 / 12

Step 6:
When dividing 71 by 12, we get 5 with a remainder of 11.
Use 5 as the next digit of our solution. 
Result so far: 65765.0
If we take 60 away from 71, we end up with 11.
Append the next digit (2) from the dividend to 11 and continue with: 112 / 12

Going ahead to step 7:
12 can be fit into 112 9 times, resulting in a remainder of 4.
Write down 9 as next digit of the result. 
Result so far: 657659.0
If we take 108 away from 112, we end up with 4.
Bring next digit (4) of the dividend behind the 4 and repeat the process: 44 / 12

Going ahead to step 8:
If we divide 44 by 12, we get 3 and a remainder of 8.
Use 3 as the next digit of our solution. 
Result so far: 6576593.0
Subtracting 36 from 44 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.

On to step 9:
The number 12 fits into 80 6 times, leaving a remainder of 8.
Record the quotient 6 as the next digit in the result. 
Result so far: 6576593.6
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.

Advancing 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: 6576593.66
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 6576593.66, and the remainder is 0.008.