It takes 30 days for a project to be completed by team B alone. Now team A completes (2/3) of the project first, and then team B will continue to complete it. How many days does team B still need to do.
一项工程由乙队单独做需要30天完成，现在先由甲队完成这项工程的(2/3)，以后由乙队继续完成，乙队还需做多少天．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 - (2/3)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 / 30</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">(1/3) / (1/30)</gadget>
<output>10</output>

<result>10</result>