[log(5)8]*[log(32)5]+log(9)8/log(3)2
=log5(8)/log5(32)+log3^2(2^3)/log3(2)
换底公式
=log32(8)+3/2*log3(2)/log3(2)
=log2^5(2^3)+3/2
=3/5 log2(2)+3/2
=3/5+3/2
=6/10+15/10
=21/10