A manuscript is typed separately, A takes 8 hours, and B takes 10 hours, and the work efficiency of B is much lower than that of A.
一份书稿，单独打，甲要8小时，乙要10小时，乙的工效比甲的工作效率低多少．
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(1/8) - (1/10)</gadget>
<output>1/40 = around 0.025</output>

<gadget id="calculator">(1/40) / (1/8)</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>