The area of a trapezoidal vegetable field is 360 square meters, the upper base of the trapezoid is 13 meters, and the lower base is 17 meters. What is the height of this trapezoidal vegetable field?
一块梯形菜地的面积是360平方米，梯形的上底是13米，下底是17米．这块梯形菜地的高是多少米？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">13 * (1/2)</gadget>
<output>13/2 = around 6.5</output>

<gadget id="calculator">17 * (1/2)</gadget>
<output>17/2 = around 8.5</output>

<gadget id="calculator">(13/2) + (17/2)</gadget>
<output>15</output>

<gadget id="calculator">360 / 15</gadget>
<output>24</output>

<result>24</result>