To celebrate the National Day, students need to make 150 small right-angled triangle flags with a base of 15cm and a height of 24cm. How much paper do they need to buy?
庆祝国庆节，同学们要做一些底为15cm，高是24cm的直角三角形的小彩旗150面，需要买多少纸．
<gadget id="calculator">24 / 2</gadget>
<output>12</output>

<gadget id="calculator">15 * 12 * 150</gadget>
<output>27_000</output>

<result>27_000</result>