We're dividing 820866 by 53 
Let's see how many times 53 fits into 820866.

Advancing to step 1:
53 goes into 8 0 times with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Fetch the next digit (2) from the dividend, attach it to 8 and continue: 82 / 53

Moving on to step 2:
82 divided by 53 is 1 with a remainder of 29.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 53 from 82, we get 29.
Grab the next digit (0) from the dividend, add it to 29, then carry on: 290 / 53

Let's proceed to step 3:
53 can be fit into 290 5 times, resulting in a remainder of 25.
Record the quotient 5 as the next digit in the result. 
Result so far: 15.0
Subtracting 265 from 290 leaves us with 25.
Include the next digit (8) from the dividend after 25, then repeat: 258 / 53

Going ahead to step 4:
258 divided by 53 is 4 with a remainder of 46.
Use 4 as the next digit of our solution. 
Result so far: 154.0
The remainder is 46 after subtracting 212 from 258.
Grab the next digit (6) from the dividend, add it to 46, then carry on: 466 / 53

Moving on to step 5:
53 goes into 466 8 times with a remainder of 42.
Put 8 as the next digit of the answer. 
Result so far: 1548.0
If we take 424 away from 466, we end up with 42.
Take the next digit (6) from the dividend and append it to 42, then repeat: 426 / 53

Let's proceed to step 6:
53 can be fit into 426 8 times, resulting in a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 15488.0
Deduct 424 from 426 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 7:
53 goes into 20 0 times with a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 15488.0
Subtracting 0 from 20 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 8:
When dividing 200 by 53, we get 3 with a remainder of 41.
The number 3 becomes the next digit in our result. 
Result so far: 15488.03
Subtracting 159 from 200 leaves us with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Step 9:
53 goes into 410 7 times with a remainder of 39.
Record the quotient 7 as the next digit in the result. 
Result so far: 15488.037
The remainder is 39 after subtracting 371 from 410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Advancing to step 10:
53 can be fit into 390 7 times, resulting in a remainder of 19.
Record the quotient 7 as the next digit in the result. 
Result so far: 15488.0377
Deduct 371 from 390 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

The final outcome is 15488.0377, with a leftover of 0.00019.