The area of a trapezoid is 87 square meters and the height is 6 meters. What is the sum of the upper and lower bases of the trapezoid?
一个梯形的面积是87平方米，高6米，则梯形上、下底的和是多少米．
<gadget id="calculator">2 / 6</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">87 * (1/3)</gadget>
<output>29</output>

<result>29</result>