We're dividing 5286256 by 816 
We want to figure out the number of times 5286256 can be divided by 816.

On to step 1:
The number 816 fits into 5 0 times, leaving a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Grab the next digit (2) from the dividend, add it to 5, then carry on: 52 / 816

On to step 2:
The number 816 fits into 52 0 times, leaving a remainder of 52.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 52 and we're left with 52.
Fetch the next digit (8) from the dividend, attach it to 52 and continue: 528 / 816

Let's proceed to step 3:
816 goes into 528 0 times with a remainder of 528.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 528 after subtracting 0 from 528.
Bring next digit (6) of the dividend behind the 528 and repeat the process: 5286 / 816

Moving on to step 4:
The number 816 fits into 5286 6 times, leaving a remainder of 390.
Use 6 as the next digit of our solution. 
Result so far: 6.0
Subtracting 4896 from 5286 leaves us with 390.
Take the next digit (2) from the dividend and append it to 390, then repeat: 3902 / 816

Moving on to step 5:
816 goes into 3902 4 times with a remainder of 638.
Write down 4 as next digit of the result. 
Result so far: 64.0
If we subtract 3264 from 3902, we get 638.
Include the next digit (5) from the dividend after 638, then repeat: 6385 / 816

Going ahead to step 6:
6385 divided by 816 is 7 with a remainder of 673.
Use 7 as the next digit of our solution. 
Result so far: 647.0
The remainder is 673 after subtracting 5712 from 6385.
Grab the next digit (6) from the dividend, add it to 673, then carry on: 6736 / 816

On to step 7:
816 goes into 6736 8 times with a remainder of 208.
Use 8 as the next digit of our solution. 
Result so far: 6478.0
The remainder is 208 after subtracting 6528 from 6736.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2080, and continue the process.

Advancing to step 8:
816 goes into 2080 2 times with a remainder of 448.
The next digit of our result is 2. 
Result so far: 6478.2
The remainder is 448 after subtracting 1632 from 2080.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4480, and continue the process.

Moving on to step 9:
The number 816 fits into 4480 5 times, leaving a remainder of 400.
The number 5 becomes the next digit in our result. 
Result so far: 6478.25
Subtract 4080 from 4480 to get 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

Step 10:
When dividing 4000 by 816, we get 4 with a remainder of 736.
Write down 4 as next digit of the result. 
Result so far: 6478.254
Subtract 3264 from 4000 to get 736.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7360, and continue the process.

Let's proceed to step 11:
If we divide 7360 by 816, we get 9 and a remainder of 16.
Put 9 as the next digit of the answer. 
Result so far: 6478.2549
If we subtract 7344 from 7360, we 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 12:
If we divide 160 by 816, we get 0 and a remainder of 160.
Use 0 as the next digit of our solution. 
Result so far: 6478.2549
The remainder is 160 after subtracting 0 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Going ahead to step 13:
If we divide 1600 by 816, we get 1 and a remainder of 784.
Put 1 as the next digit of the answer. 
Result so far: 6478.254901
Subtracting 816 from 1600 leaves us with 784.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7840, and continue the process.

Moving on to step 14:
816 goes into 7840 9 times with a remainder of 496.
Write down 9 as next digit of the result. 
Result so far: 6478.2549019
Deduct 7344 from 7840 and we're left with 496.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4960, and continue the process.

Let's proceed to step 15:
816 can be fit into 4960 6 times, resulting in a remainder of 64.
The next digit of our result is 6. 
Result so far: 6478.25490196
Subtract 4896 from 4960 to get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

The final outcome is 6478.25490196, with a leftover of 6.4e-08.