Li Li wants to use red cloth to make a small right-angled triangle flag. Its two right-angled sides are 23 cm and 16 cm respectively. At least how much red cloth should be used.
李丽要用红布制作一面直角三角形小旗，它的两条直角边分别是23厘米和16厘米，至少要用多少的红布．
<gadget id="calculator">16 / 2</gadget>
<output>8</output>

<gadget id="calculator">23 * 8</gadget>
<output>184</output>

<result>184</result>