780858 divided by 12 
Let's see how many times 12 fits into 780858.

Advancing to step 1:
When dividing 7 by 12, we get 0 with a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Bring next digit (8) of the dividend behind the 7 and repeat the process: 78 / 12

Going ahead to step 2:
12 can be fit into 78 6 times, resulting in 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.
Grab the next digit (0) from the dividend, add it to 6, then carry on: 60 / 12

Going ahead to step 3:
When dividing 60 by 12, we get 5 with a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 65.0
If we take 60 away from 60, we end up with 0.
Bring next digit (8) of the dividend behind the 0 and repeat the process: 8 / 12

Step 4:
12 goes into 8 0 times with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 650.0
If we subtract 0 from 8, we get 8.
Grab the next digit (5) from the dividend, add it to 8, then carry on: 85 / 12

Moving on to step 5:
85 divided by 12 is 7 with a remainder of 1.
Write down 7 as next digit of the result. 
Result so far: 6507.0
The remainder is 1 after subtracting 84 from 85.
Take the next digit (8) from the dividend and append it to 1, then repeat: 18 / 12

Going ahead to step 6:
12 goes into 18 1 times with a remainder of 6.
Record the quotient 1 as the next digit in the result. 
Result so far: 65071.0
The remainder is 6 after subtracting 12 from 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 7:
If we divide 60 by 12, we get 5 and a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 65071.5
Subtract 60 from 60 to 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.

Let's proceed to step 8:
If we divide 0 by 12, we get 0 and a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 65071.5
Subtracting 0 from 0 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.

Going ahead to step 9:
If we divide 0 by 12, we get 0 and a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 65071.5
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.

The quotient of the division is 65071.5, and the remainder is 0.0.