64577580 ÷ 855 
We're looking to find how many times 855 goes into 64577580.

Moving on to step 1:
855 goes into 6 0 times with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Append the next digit (4) from the dividend to 6 and continue with: 64 / 855

Let's proceed to step 2:
The number 855 fits into 64 0 times, leaving a remainder of 64.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 64 to get 64.
Include the next digit (5) from the dividend after 64, then repeat: 645 / 855

Advancing to step 3:
645 divided by 855 is 0 with a remainder of 645.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 645, we end up with 645.
Include the next digit (7) from the dividend after 645, then repeat: 6457 / 855

On to step 4:
855 can be fit into 6457 7 times, resulting in a remainder of 472.
Use 7 as the next digit of our solution. 
Result so far: 7.0
Subtracting 5985 from 6457 leaves us with 472.
Bring next digit (7) of the dividend behind the 472 and repeat the process: 4727 / 855

Step 5:
4727 divided by 855 is 5 with a remainder of 452.
Record the quotient 5 as the next digit in the result. 
Result so far: 75.0
Deduct 4275 from 4727 and we're left with 452.
Bring next digit (5) of the dividend behind the 452 and repeat the process: 4525 / 855

Step 6:
The number 855 fits into 4525 5 times, leaving a remainder of 250.
Use 5 as the next digit of our solution. 
Result so far: 755.0
The remainder is 250 after subtracting 4275 from 4525.
Take the next digit (8) from the dividend and append it to 250, then repeat: 2508 / 855

Advancing to step 7:
2508 divided by 855 is 2 with a remainder of 798.
Record the quotient 2 as the next digit in the result. 
Result so far: 7552.0
Subtracting 1710 from 2508 leaves us with 798.
Fetch the next digit (0) from the dividend, attach it to 798 and continue: 7980 / 855

Let's proceed to step 8:
855 goes into 7980 9 times with a remainder of 285.
Use 9 as the next digit of our solution. 
Result so far: 75529.0
If we subtract 7695 from 7980, we get 285.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2850, and continue the process.

Step 9:
The number 855 fits into 2850 3 times, leaving a remainder of 285.
The next digit of our result is 3. 
Result so far: 75529.3
If we subtract 2565 from 2850, we get 285.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2850, and continue the process.

On to step 10:
The number 855 fits into 2850 3 times, leaving a remainder of 285.
Record the quotient 3 as the next digit in the result. 
Result so far: 75529.33
If we take 2565 away from 2850, we end up with 285.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2850, and continue the process.

The quotient of the division is 75529.33, and the remainder is 0.285.