85315525 ÷ 660 
Let's see how many times 660 fits into 85315525.

Step 1:
When dividing 8 by 660, we get 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
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 / 660

Let's proceed to step 2:
The number 660 fits into 85 0 times, leaving a remainder of 85.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 85 to get 85.
Append the next digit (3) from the dividend to 85 and continue with: 853 / 660

Advancing to step 3:
The number 660 fits into 853 1 times, leaving a remainder of 193.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 660 from 853, we get 193.
Include the next digit (1) from the dividend after 193, then repeat: 1931 / 660

Step 4:
660 can be fit into 1931 2 times, resulting in a remainder of 611.
The next digit of our result is 2. 
Result so far: 12.0
The remainder is 611 after subtracting 1320 from 1931.
Include the next digit (5) from the dividend after 611, then repeat: 6115 / 660

Let's proceed to step 5:
6115 divided by 660 is 9 with a remainder of 175.
The number 9 becomes the next digit in our result. 
Result so far: 129.0
If we take 5940 away from 6115, we end up with 175.
Take the next digit (5) from the dividend and append it to 175, then repeat: 1755 / 660

Advancing to step 6:
660 goes into 1755 2 times with a remainder of 435.
The number 2 becomes the next digit in our result. 
Result so far: 1292.0
The remainder is 435 after subtracting 1320 from 1755.
Fetch the next digit (2) from the dividend, attach it to 435 and continue: 4352 / 660

Step 7:
660 can be fit into 4352 6 times, resulting in a remainder of 392.
Put 6 as the next digit of the answer. 
Result so far: 12926.0
Deduct 3960 from 4352 and we're left with 392.
Grab the next digit (5) from the dividend, add it to 392, then carry on: 3925 / 660

Moving on to step 8:
When dividing 3925 by 660, we get 5 with a remainder of 625.
Put 5 as the next digit of the answer. 
Result so far: 129265.0
Subtract 3300 from 3925 to get 625.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6250, and continue the process.

Going ahead to step 9:
If we divide 6250 by 660, we get 9 and a remainder of 310.
The number 9 becomes the next digit in our result. 
Result so far: 129265.9
If we take 5940 away from 6250, we end up with 310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3100, and continue the process.

Moving on to step 10:
If we divide 3100 by 660, we get 4 and a remainder of 460.
The next digit of our result is 4. 
Result so far: 129265.94
Subtracting 2640 from 3100 leaves us with 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4600, and continue the process.

Step 11:
4600 divided by 660 is 6 with a remainder of 640.
The number 6 becomes the next digit in our result. 
Result so far: 129265.946
Subtracting 3960 from 4600 leaves us with 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6400, and continue the process.

Let's proceed to step 12:
6400 divided by 660 is 9 with a remainder of 460.
The next digit of our result is 9. 
Result so far: 129265.9469
The remainder is 460 after subtracting 5940 from 6400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4600, and continue the process.

Step 13:
660 can be fit into 4600 6 times, resulting in a remainder of 640.
Record the quotient 6 as the next digit in the result. 
Result so far: 129265.94696
If we take 3960 away from 4600, we end up with 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6400, and continue the process.

Going ahead to step 14:
660 goes into 6400 9 times with a remainder of 460.
The next digit of our result is 9. 
Result so far: 129265.946969
If we take 5940 away from 6400, we end up with 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4600, and continue the process.

Step 15:
When dividing 4600 by 660, we get 6 with a remainder of 640.
Record the quotient 6 as the next digit in the result. 
Result so far: 129265.9469696
If we subtract 3960 from 4600, we get 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6400, and continue the process.

Step 16:
When dividing 6400 by 660, we get 9 with a remainder of 460.
The next digit of our result is 9. 
Result so far: 129265.94696969
The remainder is 460 after subtracting 5940 from 6400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4600, and continue the process.

After the division, we end up with 129265.94696969 and a remainder of 4.6e-07.