66502913 ÷ 129 
We're looking to find how many times 129 goes into 66502913.

Step 1:
The number 129 fits into 6 0 times, leaving a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 129

On to step 2:
The number 129 fits into 66 0 times, leaving a remainder of 66.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 66 and we're left with 66.
Take the next digit (5) from the dividend and append it to 66, then repeat: 665 / 129

Let's proceed to step 3:
129 goes into 665 5 times with a remainder of 20.
Write down 5 as next digit of the result. 
Result so far: 5.0
Subtracting 645 from 665 leaves us with 20.
Grab the next digit (0) from the dividend, add it to 20, then carry on: 200 / 129

Going ahead to step 4:
200 divided by 129 is 1 with a remainder of 71.
The number 1 becomes the next digit in our result. 
Result so far: 51.0
Subtract 129 from 200 to get 71.
Fetch the next digit (2) from the dividend, attach it to 71 and continue: 712 / 129

Moving on to step 5:
When dividing 712 by 129, we get 5 with a remainder of 67.
The next digit of our result is 5. 
Result so far: 515.0
Subtract 645 from 712 to get 67.
Grab the next digit (9) from the dividend, add it to 67, then carry on: 679 / 129

Moving on to step 6:
When dividing 679 by 129, we get 5 with a remainder of 34.
The number 5 becomes the next digit in our result. 
Result so far: 5155.0
If we subtract 645 from 679, we get 34.
Include the next digit (1) from the dividend after 34, then repeat: 341 / 129

On to step 7:
When dividing 341 by 129, we get 2 with a remainder of 83.
The next digit of our result is 2. 
Result so far: 51552.0
Subtract 258 from 341 to get 83.
Grab the next digit (3) from the dividend, add it to 83, then carry on: 833 / 129

Moving on to step 8:
129 goes into 833 6 times with a remainder of 59.
The number 6 becomes the next digit in our result. 
Result so far: 515526.0
Subtracting 774 from 833 leaves us with 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Advancing to step 9:
590 divided by 129 is 4 with a remainder of 74.
Write down 4 as next digit of the result. 
Result so far: 515526.4
Subtract 516 from 590 to get 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Going ahead to step 10:
129 goes into 740 5 times with a remainder of 95.
Use 5 as the next digit of our solution. 
Result so far: 515526.45
If we subtract 645 from 740, we get 95.
Since there are no more digits in the dividend, we add a zero to the remainder making it 950, and continue the process.

Step 11:
The number 129 fits into 950 7 times, leaving a remainder of 47.
Write down 7 as next digit of the result. 
Result so far: 515526.457
Subtract 903 from 950 to get 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Moving on to step 12:
When dividing 470 by 129, we get 3 with a remainder of 83.
Record the quotient 3 as the next digit in the result. 
Result so far: 515526.4573
If we subtract 387 from 470, we get 83.
Since there are no more digits in the dividend, we add a zero to the remainder making it 830, and continue the process.

Going ahead to step 13:
129 can be fit into 830 6 times, resulting in a remainder of 56.
The number 6 becomes the next digit in our result. 
Result so far: 515526.45736
Subtracting 774 from 830 leaves us with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Advancing to step 14:
If we divide 560 by 129, we get 4 and a remainder of 44.
Record the quotient 4 as the next digit in the result. 
Result so far: 515526.457364
Deduct 516 from 560 and we're left with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Advancing to step 15:
129 can be fit into 440 3 times, resulting in a remainder of 53.
Use 3 as the next digit of our solution. 
Result so far: 515526.4573643
Subtracting 387 from 440 leaves us with 53.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

Going ahead to step 16:
530 divided by 129 is 4 with a remainder of 14.
Record the quotient 4 as the next digit in the result. 
Result so far: 515526.45736434
Subtract 516 from 530 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

The quotient of the division is 515526.45736434, and the remainder is 1.4e-08.