For a manuscript, A and B work together to complete (1/6) hour, A alone type (1/3) hour, how many hours does B alone complete the manuscript.
一分稿件，甲、乙两人合作打(1/6)小时完成，甲单独打(1/3)小时完成，乙单独多少小时完成这份稿件．
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 / (1/6)</gadget>
<output>6</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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

<gadget id="calculator">6 - 3</gadget>
<output>3</output>

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