The base of a triangle is 12.5 meters and the height is 7.8 meters. What is the area?
一个三角形的底是12.5米，高是7.8米，面积是多少？
<gadget id="calculator">7.8 / 2</gadget>
<output>3.9</output>

<gadget id="calculator">12.5 * 3.9</gadget>
<output>48.75</output>

<result>48.75</result>