A small red flag is a right triangle made of cloth, with a base of 11 cm and a height of 22 cm. To make 10 such flags, at least how many square centimeters of this kind of cloth are needed.
一块用布做成的直角三角形的小红旗，底是11厘米，高是22厘米．做10面这样的旗子，至少需要这种布多少平方厘米．
<gadget id="calculator">22 / 2</gadget>
<output>11</output>

<gadget id="calculator">11 * 11 * 10</gadget>
<output>1_210</output>

<result>1_210</result>