We're dividing 77710709 by 510 
We're looking to find how many times 510 goes into 77710709.

On to step 1:
The number 510 fits into 7 0 times, leaving a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Take the next digit (7) from the dividend and append it to 7, then repeat: 77 / 510

On to step 2:
When dividing 77 by 510, we get 0 with a remainder of 77.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 77 leaves us with 77.
Bring next digit (7) of the dividend behind the 77 and repeat the process: 777 / 510

Step 3:
777 divided by 510 is 1 with a remainder of 267.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 267 after subtracting 510 from 777.
Grab the next digit (1) from the dividend, add it to 267, then carry on: 2671 / 510

Step 4:
If we divide 2671 by 510, we get 5 and a remainder of 121.
The next digit of our result is 5. 
Result so far: 15.0
If we take 2550 away from 2671, we end up with 121.
Take the next digit (0) from the dividend and append it to 121, then repeat: 1210 / 510

Going ahead to step 5:
510 goes into 1210 2 times with a remainder of 190.
Use 2 as the next digit of our solution. 
Result so far: 152.0
If we subtract 1020 from 1210, we get 190.
Include the next digit (7) from the dividend after 190, then repeat: 1907 / 510

On to step 6:
If we divide 1907 by 510, we get 3 and a remainder of 377.
Use 3 as the next digit of our solution. 
Result so far: 1523.0
The remainder is 377 after subtracting 1530 from 1907.
Take the next digit (0) from the dividend and append it to 377, then repeat: 3770 / 510

Let's proceed to step 7:
If we divide 3770 by 510, we get 7 and a remainder of 200.
The number 7 becomes the next digit in our result. 
Result so far: 15237.0
The remainder is 200 after subtracting 3570 from 3770.
Append the next digit (9) from the dividend to 200 and continue with: 2009 / 510

On to step 8:
510 goes into 2009 3 times with a remainder of 479.
Record the quotient 3 as the next digit in the result. 
Result so far: 152373.0
Deduct 1530 from 2009 and we're left with 479.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4790, and continue the process.

Let's proceed to step 9:
When dividing 4790 by 510, we get 9 with a remainder of 200.
Write down 9 as next digit of the result. 
Result so far: 152373.9
Subtracting 4590 from 4790 leaves us with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Moving on to step 10:
510 can be fit into 2000 3 times, resulting in a remainder of 470.
The next digit of our result is 3. 
Result so far: 152373.93
Subtracting 1530 from 2000 leaves us with 470.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4700, and continue the process.

Advancing to step 11:
The number 510 fits into 4700 9 times, leaving a remainder of 110.
Put 9 as the next digit of the answer. 
Result so far: 152373.939
The remainder is 110 after subtracting 4590 from 4700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

Going ahead to step 12:
If we divide 1100 by 510, we get 2 and a remainder of 80.
The number 2 becomes the next digit in our result. 
Result so far: 152373.9392
If we take 1020 away from 1100, we end up with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Step 13:
800 divided by 510 is 1 with a remainder of 290.
Write down 1 as next digit of the result. 
Result so far: 152373.93921
Subtracting 510 from 800 leaves us with 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2900, and continue the process.

Going ahead to step 14:
If we divide 2900 by 510, we get 5 and a remainder of 350.
The next digit of our result is 5. 
Result so far: 152373.939215
If we take 2550 away from 2900, we end up with 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3500, and continue the process.

On to step 15:
510 can be fit into 3500 6 times, resulting in a remainder of 440.
Write down 6 as next digit of the result. 
Result so far: 152373.9392156
The remainder is 440 after subtracting 3060 from 3500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4400, and continue the process.

Going ahead to step 16:
The number 510 fits into 4400 8 times, leaving a remainder of 320.
Put 8 as the next digit of the answer. 
Result so far: 152373.93921568
If we subtract 4080 from 4400, we get 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

The final outcome is 152373.93921568, with a leftover of 3.2e-07.