77109663 ÷ 810 
We want to divide 77109663 by 810.

Moving on to step 1:
810 goes into 7 0 times with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Fetch the next digit (7) from the dividend, attach it to 7 and continue: 77 / 810

Going ahead to step 2:
810 can be fit into 77 0 times, resulting in a remainder of 77.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 77, we end up with 77.
Grab the next digit (1) from the dividend, add it to 77, then carry on: 771 / 810

Going ahead to step 3:
When dividing 771 by 810, we get 0 with a remainder of 771.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 771 and we're left with 771.
Grab the next digit (0) from the dividend, add it to 771, then carry on: 7710 / 810

Moving on to step 4:
When dividing 7710 by 810, we get 9 with a remainder of 420.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
Subtracting 7290 from 7710 leaves us with 420.
Grab the next digit (9) from the dividend, add it to 420, then carry on: 4209 / 810

Advancing to step 5:
810 goes into 4209 5 times with a remainder of 159.
Put 5 as the next digit of the answer. 
Result so far: 95.0
If we take 4050 away from 4209, we end up with 159.
Append the next digit (6) from the dividend to 159 and continue with: 1596 / 810

Advancing to step 6:
810 can be fit into 1596 1 times, resulting in a remainder of 786.
The number 1 becomes the next digit in our result. 
Result so far: 951.0
If we take 810 away from 1596, we end up with 786.
Bring next digit (6) of the dividend behind the 786 and repeat the process: 7866 / 810

Let's proceed to step 7:
If we divide 7866 by 810, we get 9 and a remainder of 576.
Record the quotient 9 as the next digit in the result. 
Result so far: 9519.0
Deduct 7290 from 7866 and we're left with 576.
Bring next digit (3) of the dividend behind the 576 and repeat the process: 5763 / 810

Let's proceed to step 8:
When dividing 5763 by 810, we get 7 with a remainder of 93.
Use 7 as the next digit of our solution. 
Result so far: 95197.0
Deduct 5670 from 5763 and we're left with 93.
Since there are no more digits in the dividend, we add a zero to the remainder making it 930, and continue the process.

Moving on to step 9:
810 goes into 930 1 times with a remainder of 120.
Write down 1 as next digit of the result. 
Result so far: 95197.1
Subtract 810 from 930 to get 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Step 10:
810 can be fit into 1200 1 times, resulting in a remainder of 390.
The number 1 becomes the next digit in our result. 
Result so far: 95197.11
Subtracting 810 from 1200 leaves us with 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3900, and continue the process.

The final result is 95197.11 with a remainder of 0.39.