We look at the division of 86535390 by 660 
Our goal is to divide 86535390 by 660.

Advancing to step 1:
660 can be fit into 8 0 times, resulting in a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Include the next digit (6) from the dividend after 8, then repeat: 86 / 660

Going ahead to step 2:
When dividing 86 by 660, we get 0 with a remainder of 86.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 86, we get 86.
Include the next digit (5) from the dividend after 86, then repeat: 865 / 660

Let's proceed to step 3:
660 goes into 865 1 times with a remainder of 205.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 205 after subtracting 660 from 865.
Fetch the next digit (3) from the dividend, attach it to 205 and continue: 2053 / 660

Moving on to step 4:
The number 660 fits into 2053 3 times, leaving a remainder of 73.
Record the quotient 3 as the next digit in the result. 
Result so far: 13.0
Subtracting 1980 from 2053 leaves us with 73.
Append the next digit (5) from the dividend to 73 and continue with: 735 / 660

Step 5:
660 goes into 735 1 times with a remainder of 75.
Write down 1 as next digit of the result. 
Result so far: 131.0
Subtract 660 from 735 to get 75.
Append the next digit (3) from the dividend to 75 and continue with: 753 / 660

Let's proceed to step 6:
When dividing 753 by 660, we get 1 with a remainder of 93.
Put 1 as the next digit of the answer. 
Result so far: 1311.0
If we subtract 660 from 753, we get 93.
Include the next digit (9) from the dividend after 93, then repeat: 939 / 660

Step 7:
939 divided by 660 is 1 with a remainder of 279.
The next digit of our result is 1. 
Result so far: 13111.0
If we subtract 660 from 939, we get 279.
Include the next digit (0) from the dividend after 279, then repeat: 2790 / 660

Going ahead to step 8:
The number 660 fits into 2790 4 times, leaving a remainder of 150.
The next digit of our result is 4. 
Result so far: 131114.0
Subtracting 2640 from 2790 leaves us with 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

Advancing to step 9:
1500 divided by 660 is 2 with a remainder of 180.
Use 2 as the next digit of our solution. 
Result so far: 131114.2
Deduct 1320 from 1500 and we're left with 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

On to step 10:
If we divide 1800 by 660, we get 2 and a remainder of 480.
Put 2 as the next digit of the answer. 
Result so far: 131114.22
Subtract 1320 from 1800 to get 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

In conclusion, the division gives 131114.22 with a balance of 0.48.