For a manuscript, A alone typed (1/2) hour to finish, B alone typed (1/3) hour to finish. If two people work together, you probably won't finish it in more than a few hours.
一份稿件，甲单独打(1/2)小时完成，乙单独打(1/3)小时完成．两人合做，你估计不会超过多少小时完成．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>