6/3++8/5++10/7++12/9++14/11++16/13++18/15++20/17++22/19++24/21
это примерно равно 13.5426237333358
6/3=2
8/5=1.6
10/7=1.5
12/9=1.3
14/11=1.2
16/13=1.2
18/15=1.2
20/17=1.17
22/19=1.15
24/21=1.14
2+1.6+1.5+1.3+1.2+1.2+1.2+1.17+1.15+1.14=13.46