Master Zhang takes (1/2) hour to produce one part, and Master Li takes (1/3) hour to produce one part. What is the work efficiency of Master Li compared to Master Zhang.
张师傅生产一个零件用(1/2)小时，李师傅生产一个用(1/3)小时，李师傅的工作效率是张师傅的多少．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / (1/2)</gadget>
<output>2</output>

<gadget id="calculator">1 / (1/3) / 2</gadget>
<output>3/2 = around 1.5</output>

<result>3/2 = around 1.5</result>