Team A takes 30 days to complete a project, and team B’s efficiency is (2/3) that of team A. How many days does team B need to complete?
一项工程甲队要30天完成，乙队的效率是甲队的(2/3)，乙队要多少天完成．
<gadget id="calculator">1 / 30</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(1/30) * (2/3)</gadget>
<output>1/45 = around 0.022222</output>

<gadget id="calculator">1 / (1/45)</gadget>
<output>45</output>

<result>45</result>