The area of a trapezoid is 270 square meters. Its upper base is 28 meters, and its lower base is 32 meters. How many meters is it high? (column equation solution)
一块梯形地的面积是270平方米．它的上底是28米，下底是32米，高是多少米？(列方程解答)
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">28 * (1/2)</gadget>
<output>14</output>

<gadget id="calculator">32 * (1/2)</gadget>
<output>16</output>

<gadget id="calculator">14 + 16</gadget>
<output>30</output>

<gadget id="calculator">270 / 30</gadget>
<output>9</output>

<result>9</result>