We're dividing 816391 by 64 
Our goal is to divide 816391 by 64.

Let's proceed to step 1:
64 can be fit into 8 0 times, resulting in a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Include the next digit (1) from the dividend after 8, then repeat: 81 / 64

Going ahead to step 2:
The number 64 fits into 81 1 times, leaving a remainder of 17.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 64 from 81 to get 17.
Include the next digit (6) from the dividend after 17, then repeat: 176 / 64

Let's proceed to step 3:
64 can be fit into 176 2 times, resulting in a remainder of 48.
Use 2 as the next digit of our solution. 
Result so far: 12.0
If we take 128 away from 176, we end up with 48.
Grab the next digit (3) from the dividend, add it to 48, then carry on: 483 / 64

Step 4:
If we divide 483 by 64, we get 7 and a remainder of 35.
The number 7 becomes the next digit in our result. 
Result so far: 127.0
If we subtract 448 from 483, we get 35.
Fetch the next digit (9) from the dividend, attach it to 35 and continue: 359 / 64

Let's proceed to step 5:
The number 64 fits into 359 5 times, leaving a remainder of 39.
Write down 5 as next digit of the result. 
Result so far: 1275.0
Subtracting 320 from 359 leaves us with 39.
Grab the next digit (1) from the dividend, add it to 39, then carry on: 391 / 64

Going ahead to step 6:
When dividing 391 by 64, we get 6 with a remainder of 7.
Record the quotient 6 as the next digit in the result. 
Result so far: 12756.0
If we subtract 384 from 391, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Step 7:
The number 64 fits into 70 1 times, leaving a remainder of 6.
Use 1 as the next digit of our solution. 
Result so far: 12756.1
If we subtract 64 from 70, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 8:
64 goes into 60 0 times with a remainder of 60.
Use 0 as the next digit of our solution. 
Result so far: 12756.1
Subtracting 0 from 60 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 9:
64 can be fit into 600 9 times, resulting in a remainder of 24.
Write down 9 as next digit of the result. 
Result so far: 12756.109
If we take 576 away from 600, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Moving on to step 10:
The number 64 fits into 240 3 times, leaving a remainder of 48.
Put 3 as the next digit of the answer. 
Result so far: 12756.1093
The remainder is 48 after subtracting 192 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Let's proceed to step 11:
64 can be fit into 480 7 times, resulting in a remainder of 32.
The next digit of our result is 7. 
Result so far: 12756.10937
Subtract 448 from 480 to get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

On to step 12:
The number 64 fits into 320 5 times, leaving a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 12756.109375
Subtract 320 from 320 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 13:
0 divided by 64 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 12756.109375
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 14:
64 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 12756.109375
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 12756.109375 with a remainder of 0.0.