To produce the same product, Master Wang spent 4 hours, and Master Zhang spent 5 hours. How much is Master Zhang’s work efficiency compared to Master Wang?
生产同样的产品，王师傅用了4小时，张师傅用了5小时，张师傅的工作效率是王师傅的多少
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/5) / (1/4)</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>