78430 divided by 12 
We want to figure out the number of times 78430 can be divided by 12.

On to step 1:
12 can be fit into 7 0 times, resulting in a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Include the next digit (8) from the dividend after 7, then repeat: 78 / 12

Advancing to step 2:
12 goes into 78 6 times with a remainder of 6.
Use 6 as the next digit of our solution. 
Result so far: 6.0
If we subtract 72 from 78, we get 6.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 12

On to step 3:
12 can be fit into 64 5 times, resulting in a remainder of 4.
The next digit of our result is 5. 
Result so far: 65.0
Subtract 60 from 64 to get 4.
Bring next digit (3) of the dividend behind the 4 and repeat the process: 43 / 12

Let's proceed to step 4:
If we divide 43 by 12, we get 3 and a remainder of 7.
The number 3 becomes the next digit in our result. 
Result so far: 653.0
The remainder is 7 after subtracting 36 from 43.
Fetch the next digit (0) from the dividend, attach it to 7 and continue: 70 / 12

Going ahead to step 5:
12 can be fit into 70 5 times, resulting in a remainder of 10.
Use 5 as the next digit of our solution. 
Result so far: 6535.0
If we subtract 60 from 70, we 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.

Step 6:
100 divided by 12 is 8 with a remainder of 4.
Put 8 as the next digit of the answer. 
Result so far: 6535.8
Subtract 96 from 100 to 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.

Going ahead to step 7:
If we divide 40 by 12, we get 3 and a remainder of 4.
Write down 3 as next digit of the result. 
Result so far: 6535.83
If we subtract 36 from 40, 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 8:
When dividing 40 by 12, we get 3 with a remainder of 4.
The next digit of our result is 3. 
Result so far: 6535.833
Subtract 36 from 40 to 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.

After the division, we end up with 6535.833 and a remainder of 0.0004.