3 people work in pairs to carry 36 tables upstairs, how many times each person goes upstairs on average.
3个人两两合作，抬36张桌子上楼，平均每人上多少次楼．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">36 * (2/3)</gadget>
<output>24</output>

<result>24</result>