The area of a trapezoid is 45 square meters, the lower base is 10 meters, and the upper base is 5 meters. What is its height in meters?
一块梯形的地面积为45平方米，下底是10米；上底是5米，求它的高是多少米？
<gadget id="calculator">10 + 5</gadget>
<output>15</output>

<gadget id="calculator">2 / 15</gadget>
<output>2/15 = around 0.133333</output>

<gadget id="calculator">45 * (2/15)</gadget>
<output>6</output>

<result>6</result>