21.计算:log32743+lg5+7log72+log23⋅log94+lg2={\log _3}\frac{\sqrt[4]{27}}{3}+lg5+{7^{{{\log }_7}2}}+{\log _2}3\cdot {\log _9}4+lg2=log33427+lg5+7log72+log23⋅log94+lg2=___154\frac{15}{4}415___.