We divide 64139397 by 129
We want to figure out the number of times 64139397 can be divided by 129.

On to step 1:
The number 129 fits into 6 0 times, leaving a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Grab the next digit (4) from the dividend, add it to 6, then carry on: 64 / 129

Let's proceed to step 2:
When dividing 64 by 129, we get 0 with a remainder of 64.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 64 leaves us with 64.
Append the next digit (1) from the dividend to 64 and continue with: 641 / 129

On to step 3:
The number 129 fits into 641 4 times, leaving a remainder of 125.
Use 4 as the next digit of our solution. 
Result so far: 4.0
If we subtract 516 from 641, we get 125.
Include the next digit (3) from the dividend after 125, then repeat: 1253 / 129

Going ahead to step 4:
129 goes into 1253 9 times with a remainder of 92.
The number 9 becomes the next digit in our result. 
Result so far: 49.0
Subtracting 1161 from 1253 leaves us with 92.
Take the next digit (9) from the dividend and append it to 92, then repeat: 929 / 129

Step 5:
When dividing 929 by 129, we get 7 with a remainder of 26.
Write down 7 as next digit of the result. 
Result so far: 497.0
Subtracting 903 from 929 leaves us with 26.
Append the next digit (3) from the dividend to 26 and continue with: 263 / 129

Moving on to step 6:
If we divide 263 by 129, we get 2 and a remainder of 5.
Write down 2 as next digit of the result. 
Result so far: 4972.0
Deduct 258 from 263 and we're left with 5.
Bring next digit (9) of the dividend behind the 5 and repeat the process: 59 / 129

Advancing to step 7:
59 divided by 129 is 0 with a remainder of 59.
The next digit of our result is 0. 
Result so far: 49720.0
If we subtract 0 from 59, we get 59.
Grab the next digit (7) from the dividend, add it to 59, then carry on: 597 / 129

Advancing to step 8:
If we divide 597 by 129, we get 4 and a remainder of 81.
The number 4 becomes the next digit in our result. 
Result so far: 497204.0
Subtracting 516 from 597 leaves us with 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Going ahead to step 9:
If we divide 810 by 129, we get 6 and a remainder of 36.
Use 6 as the next digit of our solution. 
Result so far: 497204.6
If we subtract 774 from 810, we get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Going ahead to step 10:
When dividing 360 by 129, we get 2 with a remainder of 102.
The next digit of our result is 2. 
Result so far: 497204.62
Deduct 258 from 360 and we're left with 102.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1020, and continue the process.

Moving on to step 11:
When dividing 1020 by 129, we get 7 with a remainder of 117.
The next digit of our result is 7. 
Result so far: 497204.627
Deduct 903 from 1020 and we're left with 117.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1170, and continue the process.

Step 12:
The number 129 fits into 1170 9 times, leaving a remainder of 9.
The next digit of our result is 9. 
Result so far: 497204.6279
If we take 1161 away from 1170, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 13:
If we divide 90 by 129, we get 0 and a remainder of 90.
The number 0 becomes the next digit in our result. 
Result so far: 497204.6279
Deduct 0 from 90 and we're left with 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 14:
The number 129 fits into 900 6 times, leaving a remainder of 126.
Record the quotient 6 as the next digit in the result. 
Result so far: 497204.627906
The remainder is 126 after subtracting 774 from 900.
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 15:
129 can be fit into 1260 9 times, resulting in a remainder of 99.
The next digit of our result is 9. 
Result so far: 497204.6279069
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.

Let's proceed to step 16:
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: 497204.62790697
If we subtract 903 from 990, we get 87.
Since there are no more digits in the dividend, we add a zero to the remainder making it 870, and continue the process.

In conclusion, the division gives 497204.62790697 with a balance of 8.7e-08.