We look at the division of 76403564 by 864 
We're looking to find how many times 864 goes into 76403564.

Moving on to step 1:
If we divide 7 by 864, we get 0 and a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Fetch the next digit (6) from the dividend, attach it to 7 and continue: 76 / 864

On to step 2:
864 goes into 76 0 times with a remainder of 76.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 76, we end up with 76.
Include the next digit (4) from the dividend after 76, then repeat: 764 / 864

Moving on to step 3:
864 can be fit into 764 0 times, resulting in a remainder of 764.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 764, we get 764.
Take the next digit (0) from the dividend and append it to 764, then repeat: 7640 / 864

On to step 4:
7640 divided by 864 is 8 with a remainder of 728.
Use 8 as the next digit of our solution. 
Result so far: 8.0
If we subtract 6912 from 7640, we get 728.
Include the next digit (3) from the dividend after 728, then repeat: 7283 / 864

Moving on to step 5:
864 can be fit into 7283 8 times, resulting in a remainder of 371.
The number 8 becomes the next digit in our result. 
Result so far: 88.0
If we subtract 6912 from 7283, we get 371.
Fetch the next digit (5) from the dividend, attach it to 371 and continue: 3715 / 864

Moving on to step 6:
864 goes into 3715 4 times with a remainder of 259.
Write down 4 as next digit of the result. 
Result so far: 884.0
If we take 3456 away from 3715, we end up with 259.
Include the next digit (6) from the dividend after 259, then repeat: 2596 / 864

Moving on to step 7:
The number 864 fits into 2596 3 times, leaving a remainder of 4.
Put 3 as the next digit of the answer. 
Result so far: 8843.0
Subtracting 2592 from 2596 leaves us with 4.
Append the next digit (4) from the dividend to 4 and continue with: 44 / 864

Step 8:
If we divide 44 by 864, we get 0 and a remainder of 44.
Use 0 as the next digit of our solution. 
Result so far: 88430.0
The remainder is 44 after subtracting 0 from 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Step 9:
The number 864 fits into 440 0 times, leaving a remainder of 440.
The next digit of our result is 0. 
Result so far: 88430.0
If we subtract 0 from 440, we get 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4400, and continue the process.

Advancing to step 10:
4400 divided by 864 is 5 with a remainder of 80.
Put 5 as the next digit of the answer. 
Result so far: 88430.05
Deduct 4320 from 4400 and we're left with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

On to step 11:
When dividing 800 by 864, we get 0 with a remainder of 800.
Write down 0 as next digit of the result. 
Result so far: 88430.05
If we take 0 away from 800, we end up with 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8000, and continue the process.

Moving on to step 12:
864 goes into 8000 9 times with a remainder of 224.
Write down 9 as next digit of the result. 
Result so far: 88430.0509
If we subtract 7776 from 8000, we get 224.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2240, and continue the process.

On to step 13:
864 can be fit into 2240 2 times, resulting in a remainder of 512.
Put 2 as the next digit of the answer. 
Result so far: 88430.05092
Subtract 1728 from 2240 to get 512.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5120, and continue the process.

Step 14:
864 can be fit into 5120 5 times, resulting in a remainder of 800.
Write down 5 as next digit of the result. 
Result so far: 88430.050925
Subtracting 4320 from 5120 leaves us with 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8000, and continue the process.

Moving on to step 15:
864 goes into 8000 9 times with a remainder of 224.
Record the quotient 9 as the next digit in the result. 
Result so far: 88430.0509259
If we subtract 7776 from 8000, we get 224.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2240, and continue the process.

Let's proceed to step 16:
864 goes into 2240 2 times with a remainder of 512.
Record the quotient 2 as the next digit in the result. 
Result so far: 88430.05092592
If we take 1728 away from 2240, we end up with 512.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5120, and continue the process.

The final result is 88430.05092592 with a remainder of 5.12e-07.