A triangular wooden billboard with a base of 7.5 meters and a height of 1.6 meters. To make 10 billboards of this kind, how many square meters of wood do you need at least?
一块三角形木制广告牌，底7.5米，高1.6米．要做这种广告牌10块，至少需要多少平方米木料？
<gadget id="calculator">1.6 / 2</gadget>
<output>0.8</output>

<gadget id="calculator">7.5 * 0.8 * 10</gadget>
<output>60</output>

<result>60</result>