The upper base of a trapezoid is 1.8 meters, the lower base is 2.2 meters, and the area is 7.2 square meters. How many meters is it high? (column equation solution)
一个梯形的上底是1.8米，下底是2.2米，面积是7.2平方米，它的高是几米？(列方程解答)
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1.8 * (1/2)</gadget>
<output>0.9</output>

<gadget id="calculator">2.2 * (1/2)</gadget>
<output>1.1</output>

<gadget id="calculator">0.9 + 1.1</gadget>
<output>2</output>

<gadget id="calculator">7.2 / 2</gadget>
<output>3.6</output>

<result>3.6</result>