Let's divide 856599 by 66
Our goal is to divide 856599 by 66.

Let's proceed to step 1:
66 can be fit into 8 0 times, resulting in a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Take the next digit (5) from the dividend and append it to 8, then repeat: 85 / 66

On to step 2:
85 divided by 66 is 1 with a remainder of 19.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtracting 66 from 85 leaves us with 19.
Grab the next digit (6) from the dividend, add it to 19, then carry on: 196 / 66

Moving on to step 3:
196 divided by 66 is 2 with a remainder of 64.
The number 2 becomes the next digit in our result. 
Result so far: 12.0
Deduct 132 from 196 and we're left with 64.
Append the next digit (5) from the dividend to 64 and continue with: 645 / 66

Step 4:
When dividing 645 by 66, we get 9 with a remainder of 51.
Put 9 as the next digit of the answer. 
Result so far: 129.0
If we subtract 594 from 645, we get 51.
Include the next digit (9) from the dividend after 51, then repeat: 519 / 66

Moving on to step 5:
66 can be fit into 519 7 times, resulting in a remainder of 57.
Put 7 as the next digit of the answer. 
Result so far: 1297.0
If we take 462 away from 519, we end up with 57.
Include the next digit (9) from the dividend after 57, then repeat: 579 / 66

Advancing to step 6:
The number 66 fits into 579 8 times, leaving a remainder of 51.
The number 8 becomes the next digit in our result. 
Result so far: 12978.0
Subtracting 528 from 579 leaves us 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.

Step 7:
66 goes into 510 7 times with a remainder of 48.
The next digit of our result is 7. 
Result so far: 12978.7
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.

Let's proceed to step 8:
The number 66 fits into 480 7 times, leaving a remainder of 18.
The next digit of our result is 7. 
Result so far: 12978.77
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.

The final result is 12978.77 with a remainder of 0.018.