A triangle whose base is 5 cm and height is 3 cm is enlarged by 4:1, what is the area of the figure obtained in square centimeters?
一个底是5厘米，高是3厘米的三角形按4：1放大，得到的图形的面积是多少平方厘米．
<gadget id="calculator">5 * 4</gadget>
<output>20</output>

<gadget id="calculator">3 * 4</gadget>
<output>12</output>

<gadget id="calculator">20 * 12</gadget>
<output>240</output>

<gadget id="calculator">240 / 2</gadget>
<output>120</output>

<result>120</result>