The area of the triangle is 28 square meters, the height is 4 meters, what is the base in meters?
三角形的面积是28平方米，高4米，底是多少米．
<gadget id="calculator">28 / 4</gadget>
<output>7</output>

<gadget id="calculator">2 * 7</gadget>
<output>14</output>

<result>14</result>