We look at the division of 855873 by 66 
We want to figure out the number of times 855873 can be divided by 66.

Going ahead to step 1:
If we divide 8 by 66, we get 0 and a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Include the next digit (5) from the dividend after 8, then repeat: 85 / 66

Advancing to step 2:
66 can be fit into 85 1 times, resulting in a remainder of 19.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 66 from 85 and we're left with 19.
Include the next digit (5) from the dividend after 19, then repeat: 195 / 66

Step 3:
195 divided by 66 is 2 with a remainder of 63.
The next digit of our result is 2. 
Result so far: 12.0
The remainder is 63 after subtracting 132 from 195.
Append the next digit (8) from the dividend to 63 and continue with: 638 / 66

Going ahead to step 4:
If we divide 638 by 66, we get 9 and a remainder of 44.
Record the quotient 9 as the next digit in the result. 
Result so far: 129.0
If we take 594 away from 638, we end up with 44.
Append the next digit (7) from the dividend to 44 and continue with: 447 / 66

Going ahead to step 5:
The number 66 fits into 447 6 times, leaving a remainder of 51.
Use 6 as the next digit of our solution. 
Result so far: 1296.0
If we take 396 away from 447, we end up with 51.
Include the next digit (3) from the dividend after 51, then repeat: 513 / 66

Step 6:
66 can be fit into 513 7 times, resulting in a remainder of 51.
The number 7 becomes the next digit in our result. 
Result so far: 12967.0
If we take 462 away from 513, we end up with 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Going ahead to step 7:
510 divided by 66 is 7 with a remainder of 48.
Put 7 as the next digit of the answer. 
Result so far: 12967.7
Subtracting 462 from 510 leaves us with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

On to step 8:
When dividing 480 by 66, we get 7 with a remainder of 18.
The next digit of our result is 7. 
Result so far: 12967.77
Subtract 462 from 480 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

In conclusion, the division gives 12967.77 with a balance of 0.018.