A parallelogram has a base of 10 cm and a height of 8 cm. If its base and height are tripled, how many times will its area be enlarged?
一个平行四边形的底是10cm，高是8cm．如果把它的底和高都扩大3倍，那么它的面积扩大多少倍
<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<result>9</result>