The area of a triangular piece of land is 780 square meters, its height is 30 meters, and its base is in meters.
一块三角形的地的面积是780平方米，它的高是30米，底是多少米．
<gadget id="calculator">2 / 30</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">780 * (1/15)</gadget>
<output>52</output>

<result>52</result>