77438028 divided by 129 
We're looking to find how many times 129 goes into 77438028.

Advancing to step 1:
The number 129 fits into 7 0 times, leaving a remainder of 7.
Write down 0 as next digit of the result. 
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 / 129

Moving on to step 2:
129 can be fit into 77 0 times, resulting in a remainder of 77.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 77 and we're left with 77.
Bring next digit (4) of the dividend behind the 77 and repeat the process: 774 / 129

Advancing to step 3:
When dividing 774 by 129, we get 6 with a remainder of 0.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
If we subtract 774 from 774, we get 0.
Append the next digit (3) from the dividend to 0 and continue with: 3 / 129

Moving on to step 4:
3 divided by 129 is 0 with a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 60.0
Subtract 0 from 3 to get 3.
Grab the next digit (8) from the dividend, add it to 3, then carry on: 38 / 129

Step 5:
129 can be fit into 38 0 times, resulting in a remainder of 38.
Write down 0 as next digit of the result. 
Result so far: 600.0
The remainder is 38 after subtracting 0 from 38.
Grab the next digit (0) from the dividend, add it to 38, then carry on: 380 / 129

Moving on to step 6:
If we divide 380 by 129, we get 2 and a remainder of 122.
Use 2 as the next digit of our solution. 
Result so far: 6002.0
If we subtract 258 from 380, we get 122.
Fetch the next digit (2) from the dividend, attach it to 122 and continue: 1222 / 129

Step 7:
If we divide 1222 by 129, we get 9 and a remainder of 61.
Put 9 as the next digit of the answer. 
Result so far: 60029.0
If we subtract 1161 from 1222, we get 61.
Fetch the next digit (8) from the dividend, attach it to 61 and continue: 618 / 129

Advancing to step 8:
129 goes into 618 4 times with a remainder of 102.
Write down 4 as next digit of the result. 
Result so far: 600294.0
If we subtract 516 from 618, we get 102.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1020, and continue the process.

Step 9:
129 goes into 1020 7 times with a remainder of 117.
The number 7 becomes the next digit in our result. 
Result so far: 600294.7
If we subtract 903 from 1020, we get 117.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1170, and continue the process.

Going ahead to step 10:
When dividing 1170 by 129, we get 9 with a remainder of 9.
Use 9 as the next digit of our solution. 
Result so far: 600294.79
Subtract 1161 from 1170 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

On to step 11:
129 can be fit into 90 0 times, resulting in a remainder of 90.
Write down 0 as next digit of the result. 
Result so far: 600294.79
The remainder is 90 after subtracting 0 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Going ahead to step 12:
If we divide 900 by 129, we get 6 and a remainder of 126.
Write down 6 as next digit of the result. 
Result so far: 600294.7906
If we subtract 774 from 900, we get 126.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1260, and continue the process.

Moving on to step 13:
129 goes into 1260 9 times with a remainder of 99.
Write down 9 as next digit of the result. 
Result so far: 600294.79069
If we take 1161 away from 1260, we end up with 99.
Since there are no more digits in the dividend, we add a zero to the remainder making it 990, and continue the process.

Moving on to step 14:
The number 129 fits into 990 7 times, leaving a remainder of 87.
Put 7 as the next digit of the answer. 
Result so far: 600294.790697
Deduct 903 from 990 and we're left with 87.
Since there are no more digits in the dividend, we add a zero to the remainder making it 870, and continue the process.

Let's proceed to step 15:
129 goes into 870 6 times with a remainder of 96.
The next digit of our result is 6. 
Result so far: 600294.7906976
Subtract 774 from 870 to get 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

On to step 16:
960 divided by 129 is 7 with a remainder of 57.
Write down 7 as next digit of the result. 
Result so far: 600294.79069767
If we subtract 903 from 960, we get 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

The final result is 600294.79069767 with a remainder of 5.7e-08.