5/6+5/18+5/36+1/12+1/18+5/126+5/168+5/216+1/54
=(5/6+5/18+5/36+1/12+1/18)+5/126+5/168+(5/216+1/54)
=(30/36+10/36+5/36+3/36+2/36)+5/126+5/168+(5/216+4/216)
=50/36+5/126+5/168+9/216
=(14288400+408240+306180+428652)/10287648
=1157360/10287648
=0.11249996111842084799168867364047简便计算！！