The area of a triangle is 25 square centimeters. If its base and height are doubled, what is its area?
一个三角形的面积是25平方厘米，把它的底和高都扩大到原来的2倍后，它的面积是多少平方厘米．
<gadget id="calculator">25 * 2 * 2</gadget>
<output>100</output>

<result>100</result>