We divide 64129591 by 87
We want to figure out the number of times 64129591 can be divided by 87.

Moving on to step 1:
87 can be fit into 6 0 times, resulting in a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Bring next digit (4) of the dividend behind the 6 and repeat the process: 64 / 87

On to step 2:
The number 87 fits into 64 0 times, leaving a remainder of 64.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 64 leaves us with 64.
Bring next digit (1) of the dividend behind the 64 and repeat the process: 641 / 87

Advancing to step 3:
When dividing 641 by 87, we get 7 with a remainder of 32.
Write down 7 as next digit of the result. 
Result so far: 7.0
The remainder is 32 after subtracting 609 from 641.
Take the next digit (2) from the dividend and append it to 32, then repeat: 322 / 87

Going ahead to step 4:
When dividing 322 by 87, we get 3 with a remainder of 61.
Use 3 as the next digit of our solution. 
Result so far: 73.0
If we take 261 away from 322, we end up with 61.
Fetch the next digit (9) from the dividend, attach it to 61 and continue: 619 / 87

On to step 5:
619 divided by 87 is 7 with a remainder of 10.
Record the quotient 7 as the next digit in the result. 
Result so far: 737.0
Subtracting 609 from 619 leaves us with 10.
Fetch the next digit (5) from the dividend, attach it to 10 and continue: 105 / 87

Advancing to step 6:
87 can be fit into 105 1 times, resulting in a remainder of 18.
The number 1 becomes the next digit in our result. 
Result so far: 7371.0
The remainder is 18 after subtracting 87 from 105.
Include the next digit (9) from the dividend after 18, then repeat: 189 / 87

Advancing to step 7:
If we divide 189 by 87, we get 2 and a remainder of 15.
The next digit of our result is 2. 
Result so far: 73712.0
The remainder is 15 after subtracting 174 from 189.
Include the next digit (1) from the dividend after 15, then repeat: 151 / 87

Advancing to step 8:
If we divide 151 by 87, we get 1 and a remainder of 64.
The number 1 becomes the next digit in our result. 
Result so far: 737121.0
If we take 87 away from 151, we end up with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Advancing to step 9:
640 divided by 87 is 7 with a remainder of 31.
The number 7 becomes the next digit in our result. 
Result so far: 737121.7
Subtracting 609 from 640 leaves us with 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Going ahead to step 10:
310 divided by 87 is 3 with a remainder of 49.
Write down 3 as next digit of the result. 
Result so far: 737121.73
Subtract 261 from 310 to get 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Advancing to step 11:
If we divide 490 by 87, we get 5 and a remainder of 55.
Put 5 as the next digit of the answer. 
Result so far: 737121.735
The remainder is 55 after subtracting 435 from 490.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Let's proceed to step 12:
The number 87 fits into 550 6 times, leaving a remainder of 28.
Put 6 as the next digit of the answer. 
Result so far: 737121.7356
Subtracting 522 from 550 leaves us with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Advancing to step 13:
The number 87 fits into 280 3 times, leaving a remainder of 19.
Write down 3 as next digit of the result. 
Result so far: 737121.73563
If we subtract 261 from 280, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Advancing to step 14:
87 can be fit into 190 2 times, resulting in a remainder of 16.
Record the quotient 2 as the next digit in the result. 
Result so far: 737121.735632
Subtract 174 from 190 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 15:
If we divide 160 by 87, we get 1 and a remainder of 73.
The number 1 becomes the next digit in our result. 
Result so far: 737121.7356321
Subtracting 87 from 160 leaves us with 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Moving on to step 16:
If we divide 730 by 87, we get 8 and a remainder of 34.
The number 8 becomes the next digit in our result. 
Result so far: 737121.73563218
Deduct 696 from 730 and we're left with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

In conclusion, the division gives 737121.73563218 with a balance of 3.4e-08.