(1/2+1/3+1/5+1/7+1/11+1/13)*385 =(1/2+1/3+1/13)*385+(1/5+1/7+1/1/11)*385 =192/2+128/3+29*8/13+77+55+35 =516+1/2+1/3+8/13 =517+35/78 所以整数部分是517
