Use a piece of red paper with a width of 4 meters and a width of 0.8 meters to make two small triangular flags whose right-angled sides are 0.4 meters respectively. How many sides can you make?
用一张4米，宽0.8米的红纸做两条直角边分别是0.4米的三角形小旗，能做几面？
<gadget id="calculator">4 * 0.8</gadget>
<output>3.2</output>

<gadget id="calculator">0.4 / 2</gadget>
<output>0.2</output>

<gadget id="calculator">0.4 * 0.2</gadget>
<output>0.08</output>

<gadget id="calculator">3.2 / 0.08</gadget>
<output>40</output>

<result>40</result>