We're dividing 78763795 by 864 
We want to figure out the number of times 78763795 can be divided by 864.

Step 1:
864 goes into 7 0 times with a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Include the next digit (8) from the dividend after 7, then repeat: 78 / 864

Moving on to step 2:
78 divided by 864 is 0 with a remainder of 78.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 78 and we're left with 78.
Grab the next digit (7) from the dividend, add it to 78, then carry on: 787 / 864

Step 3:
If we divide 787 by 864, we get 0 and a remainder of 787.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 787 to get 787.
Take the next digit (6) from the dividend and append it to 787, then repeat: 7876 / 864

On to step 4:
When dividing 7876 by 864, we get 9 with a remainder of 100.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
Subtract 7776 from 7876 to get 100.
Fetch the next digit (3) from the dividend, attach it to 100 and continue: 1003 / 864

Advancing to step 5:
864 can be fit into 1003 1 times, resulting in a remainder of 139.
Put 1 as the next digit of the answer. 
Result so far: 91.0
Subtracting 864 from 1003 leaves us with 139.
Grab the next digit (7) from the dividend, add it to 139, then carry on: 1397 / 864

Moving on to step 6:
1397 divided by 864 is 1 with a remainder of 533.
Use 1 as the next digit of our solution. 
Result so far: 911.0
Subtracting 864 from 1397 leaves us with 533.
Include the next digit (9) from the dividend after 533, then repeat: 5339 / 864

On to step 7:
If we divide 5339 by 864, we get 6 and a remainder of 155.
Write down 6 as next digit of the result. 
Result so far: 9116.0
The remainder is 155 after subtracting 5184 from 5339.
Bring next digit (5) of the dividend behind the 155 and repeat the process: 1555 / 864

Step 8:
If we divide 1555 by 864, we get 1 and a remainder of 691.
Record the quotient 1 as the next digit in the result. 
Result so far: 91161.0
If we take 864 away from 1555, we end up with 691.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6910, and continue the process.

Step 9:
864 can be fit into 6910 7 times, resulting in a remainder of 862.
The next digit of our result is 7. 
Result so far: 91161.7
If we subtract 6048 from 6910, we get 862.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8620, and continue the process.

Let's proceed to step 10:
When dividing 8620 by 864, we get 9 with a remainder of 844.
The next digit of our result is 9. 
Result so far: 91161.79
Deduct 7776 from 8620 and we're left with 844.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8440, and continue the process.

Moving on to step 11:
When dividing 8440 by 864, we get 9 with a remainder of 664.
Put 9 as the next digit of the answer. 
Result so far: 91161.799
If we subtract 7776 from 8440, we get 664.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6640, and continue the process.

The quotient of the division is 91161.799, and the remainder is 0.0664.