776866 divided by 78 
Let's see how many times 78 fits into 776866.

On to step 1:
When dividing 7 by 78, we get 0 with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Include the next digit (7) from the dividend after 7, then repeat: 77 / 78

On to step 2:
When dividing 77 by 78, we get 0 with a remainder of 77.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 77 and we're left with 77.
Include the next digit (6) from the dividend after 77, then repeat: 776 / 78

Moving on to step 3:
776 divided by 78 is 9 with a remainder of 74.
Use 9 as the next digit of our solution. 
Result so far: 9.0
Subtracting 702 from 776 leaves us with 74.
Bring next digit (8) of the dividend behind the 74 and repeat the process: 748 / 78

Let's proceed to step 4:
748 divided by 78 is 9 with a remainder of 46.
Put 9 as the next digit of the answer. 
Result so far: 99.0
Deduct 702 from 748 and we're left with 46.
Grab the next digit (6) from the dividend, add it to 46, then carry on: 466 / 78

Let's proceed to step 5:
The number 78 fits into 466 5 times, leaving a remainder of 76.
The number 5 becomes the next digit in our result. 
Result so far: 995.0
The remainder is 76 after subtracting 390 from 466.
Append the next digit (6) from the dividend to 76 and continue with: 766 / 78

Let's proceed to step 6:
78 goes into 766 9 times with a remainder of 64.
The next digit of our result is 9. 
Result so far: 9959.0
Subtract 702 from 766 to get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Advancing to step 7:
The number 78 fits into 640 8 times, leaving a remainder of 16.
The number 8 becomes the next digit in our result. 
Result so far: 9959.8
If we subtract 624 from 640, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 8:
160 divided by 78 is 2 with a remainder of 4.
Put 2 as the next digit of the answer. 
Result so far: 9959.82
Subtract 156 from 160 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.

Let's proceed to step 9:
78 can be fit into 40 0 times, resulting in a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 9959.82
Subtracting 0 from 40 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 10:
400 divided by 78 is 5 with a remainder of 10.
The next digit of our result is 5. 
Result so far: 9959.8205
Subtract 390 from 400 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.

Step 11:
The number 78 fits into 100 1 times, leaving a remainder of 22.
The next digit of our result is 1. 
Result so far: 9959.82051
The remainder is 22 after subtracting 78 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Step 12:
If we divide 220 by 78, we get 2 and a remainder of 64.
The number 2 becomes the next digit in our result. 
Result so far: 9959.820512
If we subtract 156 from 220, we get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Step 13:
78 can be fit into 640 8 times, resulting in a remainder of 16.
Write down 8 as next digit of the result. 
Result so far: 9959.8205128
If we take 624 away from 640, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 14:
78 can be fit into 160 2 times, resulting in a remainder of 4.
Record the quotient 2 as the next digit in the result. 
Result so far: 9959.82051282
Subtract 156 from 160 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.

The final outcome is 9959.82051282, with a leftover of 4e-09.