A small right-angled triangle flag, one right-angled side is 15 cm long, and the other right-angled side is 24 cm long. To make 150 such small flags, how many square meters of red cloth should be used at least?
一种直角三角形的小旗，一条直角边长15厘米，另一条直角边长24厘米，做150面这样的小旗，至少要用红布多少平方米？
<gadget id="calculator">24 / 2</gadget>
<output>12</output>

<gadget id="calculator">150 / 10_000</gadget>
<output>3/200 = around 0.015</output>

<gadget id="calculator">15 * 12 * (3/200)</gadget>
<output>27/10 = around 2.7</output>

<result>27/10 = around 2.7</result>