The area of a trapezoidal land is 45 square meters, the bottom is 10 meters, and the top is 50 decimeters. What is its height?
一块梯形土地的面积为45平方米，下底是10米，上底是50分米，它的高是多少米？
<gadget id="calculator">50 / 10</gadget>
<output>5</output>

<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>