77760811 ÷ 820 
We want to figure out the number of times 77760811 can be divided by 820.

Going ahead to step 1:
If we divide 7 by 820, we get 0 and a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Include the next digit (7) from the dividend after 7, then repeat: 77 / 820

On to step 2:
820 can be fit into 77 0 times, resulting in a remainder of 77.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 77 leaves us with 77.
Append the next digit (7) from the dividend to 77 and continue with: 777 / 820

Going ahead to step 3:
The number 820 fits into 777 0 times, leaving a remainder of 777.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 777 and we're left with 777.
Take the next digit (6) from the dividend and append it to 777, then repeat: 7776 / 820

Advancing to step 4:
If we divide 7776 by 820, we get 9 and a remainder of 396.
Write down 9 as next digit of the result. 
Result so far: 9.0
The remainder is 396 after subtracting 7380 from 7776.
Grab the next digit (0) from the dividend, add it to 396, then carry on: 3960 / 820

On to step 5:
When dividing 3960 by 820, we get 4 with a remainder of 680.
The next digit of our result is 4. 
Result so far: 94.0
Subtract 3280 from 3960 to get 680.
Bring next digit (8) of the dividend behind the 680 and repeat the process: 6808 / 820

Step 6:
The number 820 fits into 6808 8 times, leaving a remainder of 248.
The next digit of our result is 8. 
Result so far: 948.0
Subtract 6560 from 6808 to get 248.
Take the next digit (1) from the dividend and append it to 248, then repeat: 2481 / 820

On to step 7:
820 can be fit into 2481 3 times, resulting in a remainder of 21.
The number 3 becomes the next digit in our result. 
Result so far: 9483.0
Deduct 2460 from 2481 and we're left with 21.
Include the next digit (1) from the dividend after 21, then repeat: 211 / 820

Let's proceed to step 8:
211 divided by 820 is 0 with a remainder of 211.
The number 0 becomes the next digit in our result. 
Result so far: 94830.0
Subtracting 0 from 211 leaves us with 211.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2110, and continue the process.

Step 9:
The number 820 fits into 2110 2 times, leaving a remainder of 470.
The number 2 becomes the next digit in our result. 
Result so far: 94830.2
Subtract 1640 from 2110 to get 470.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4700, and continue the process.

Moving on to step 10:
4700 divided by 820 is 5 with a remainder of 600.
The next digit of our result is 5. 
Result so far: 94830.25
If we take 4100 away from 4700, we end up with 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6000, and continue the process.

Moving on to step 11:
820 goes into 6000 7 times with a remainder of 260.
Use 7 as the next digit of our solution. 
Result so far: 94830.257
Subtract 5740 from 6000 to get 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

Step 12:
2600 divided by 820 is 3 with a remainder of 140.
Use 3 as the next digit of our solution. 
Result so far: 94830.2573
The remainder is 140 after subtracting 2460 from 2600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Advancing to step 13:
820 goes into 1400 1 times with a remainder of 580.
Write down 1 as next digit of the result. 
Result so far: 94830.25731
Deduct 820 from 1400 and we're left with 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5800, and continue the process.

Going ahead to step 14:
The number 820 fits into 5800 7 times, leaving a remainder of 60.
Put 7 as the next digit of the answer. 
Result so far: 94830.257317
If we subtract 5740 from 5800, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 15:
The number 820 fits into 600 0 times, leaving a remainder of 600.
The next digit of our result is 0. 
Result so far: 94830.257317
Subtract 0 from 600 to get 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6000, and continue the process.

Step 16:
If we divide 6000 by 820, we get 7 and a remainder of 260.
Write down 7 as next digit of the result. 
Result so far: 94830.25731707
If we subtract 5740 from 6000, we get 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

After the division, we end up with 94830.25731707 and a remainder of 2.6e-07.