The traffic department makes 50 triangular traffic signs, each with a base of 80 cm and a height of 60 cm. How many square meters of iron sheets are needed to make these traffic signs?
交通部门制作50块三角形交通标志，每块标志底80厘米，高60厘米，制作这些交通标志，一共需要多少平方米的铁皮？
<gadget id="calculator">60 / 2</gadget>
<output>30</output>

<gadget id="calculator">50 / 10_000</gadget>
<output>1/200 = around 0.005</output>

<gadget id="calculator">80 * 30 * (1/200)</gadget>
<output>12</output>

<result>12</result>