1/3+1/4+1/5+1/6+1/7=(1/3+1/6)+1/4+1/5+1/7
=0.5+0.25+0.2+1/7
=0.95+0.05+(1/7-0.05)
=1+(1/7-1/20)>1
所以整数部分为1
（1/2+1/3+1/5+1/7+1/11+1/13）*385=385/2+385/3+385/5+385/7+385/11+385/13
=192.5+128+1/3+77+55+35+29+8/13
=(192+128+77+55+35+29)+(1/2+1/3+8/13)
=516+(1/2+1/3+1/6)+(8/13-1/6)
=517+(8/13-1/6)
整数部分为517