It is easier and quicker to answer this question by using the calculator in your computer compared with posting it on WA. But, since you are obviously not capable of carrying out that simple task, the answer is 86.66...
520
65
130
1.9231
260
Yes, 520 divided by 2 = 260
520*6/10 = 312
anything that ends in an even number can be divided.
6% of 520 feet= 6% * 520= 0.06 * 520= 31.2 feet or 31 feet 213⁄32 inches
104
65
43.3333