We look at the division of 77129104 by 503 
We want to figure out the number of times 77129104 can be divided by 503.

Going ahead to step 1:
The number 503 fits into 7 0 times, leaving 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.
Grab the next digit (7) from the dividend, add it to 7, then carry on: 77 / 503

On to step 2:
77 divided by 503 is 0 with a remainder of 77.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 77 to get 77.
Include the next digit (1) from the dividend after 77, then repeat: 771 / 503

Going ahead to step 3:
503 goes into 771 1 times with a remainder of 268.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 503 from 771 to get 268.
Include the next digit (2) from the dividend after 268, then repeat: 2682 / 503

On to step 4:
2682 divided by 503 is 5 with a remainder of 167.
Write down 5 as next digit of the result. 
Result so far: 15.0
Subtract 2515 from 2682 to get 167.
Take the next digit (9) from the dividend and append it to 167, then repeat: 1679 / 503

Let's proceed to step 5:
503 goes into 1679 3 times with a remainder of 170.
The next digit of our result is 3. 
Result so far: 153.0
If we subtract 1509 from 1679, we get 170.
Bring next digit (1) of the dividend behind the 170 and repeat the process: 1701 / 503

Moving on to step 6:
The number 503 fits into 1701 3 times, leaving a remainder of 192.
Put 3 as the next digit of the answer. 
Result so far: 1533.0
Subtracting 1509 from 1701 leaves us with 192.
Bring next digit (0) of the dividend behind the 192 and repeat the process: 1920 / 503

Step 7:
When dividing 1920 by 503, we get 3 with a remainder of 411.
Record the quotient 3 as the next digit in the result. 
Result so far: 15333.0
The remainder is 411 after subtracting 1509 from 1920.
Take the next digit (4) from the dividend and append it to 411, then repeat: 4114 / 503

Step 8:
4114 divided by 503 is 8 with a remainder of 90.
Put 8 as the next digit of the answer. 
Result so far: 153338.0
Subtract 4024 from 4114 to get 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Step 9:
When dividing 900 by 503, we get 1 with a remainder of 397.
Record the quotient 1 as the next digit in the result. 
Result so far: 153338.1
Subtract 503 from 900 to get 397.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3970, and continue the process.

On to step 10:
503 goes into 3970 7 times with a remainder of 449.
Put 7 as the next digit of the answer. 
Result so far: 153338.17
The remainder is 449 after subtracting 3521 from 3970.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4490, and continue the process.

Let's proceed to step 11:
When dividing 4490 by 503, we get 8 with a remainder of 466.
Put 8 as the next digit of the answer. 
Result so far: 153338.178
If we take 4024 away from 4490, we end up with 466.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4660, and continue the process.

Step 12:
503 can be fit into 4660 9 times, resulting in a remainder of 133.
The next digit of our result is 9. 
Result so far: 153338.1789
Subtract 4527 from 4660 to get 133.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1330, and continue the process.

Moving on to step 13:
1330 divided by 503 is 2 with a remainder of 324.
Put 2 as the next digit of the answer. 
Result so far: 153338.17892
If we subtract 1006 from 1330, we get 324.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3240, and continue the process.

Going ahead to step 14:
When dividing 3240 by 503, we get 6 with a remainder of 222.
Put 6 as the next digit of the answer. 
Result so far: 153338.178926
If we take 3018 away from 3240, we end up with 222.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2220, and continue the process.

Moving on to step 15:
503 can be fit into 2220 4 times, resulting in a remainder of 208.
The next digit of our result is 4. 
Result so far: 153338.1789264
Deduct 2012 from 2220 and we're left with 208.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2080, and continue the process.

Let's proceed to step 16:
The number 503 fits into 2080 4 times, leaving a remainder of 68.
Record the quotient 4 as the next digit in the result. 
Result so far: 153338.17892644
Subtract 2012 from 2080 to get 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Our division results in 153338.17892644 with a remaining 6.8e-08.