The area of a triangle is 10 square meters, if the base and height are enlarged by 3 times, what is its area in square meters?
一个三角形的面积是10平方米，如果底和高都扩大3倍，它的面积是多少平方米．
<gadget id="calculator">10 * 3 * 3</gadget>
<output>90</output>

<result>90</result>