Mr. Li finished typing a test paper in 15 minutes (1/3). According to this calculation, how many minutes are left?
李老师打一份试卷15分钟完成(1/3)，照这样算，剩下的还要几分钟？
<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) / 15</gadget>
<output>1/45 = around 0.022222</output>

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

<result>30</result>