A job can be completed by A alone in 2 days (1/3). According to this calculation, how many days will it take to complete the remaining work.
一件工作，甲独做2天可完成这件工作的(1/3)．照这样计算，剩下的工作还需多少天完成．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(1/3) / 2</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(2/3) / (1/6)</gadget>
<output>4</output>

<result>4</result>