Use red paper to make a triangular flag. A piece of red paper is 3 meters long and 12 decimeters wide. How many sides can be made into a triangular flag whose right angles are 3 decimeters and 2 decimeters?
用红纸做三角形小旗，一张红纸长3米，宽12分米，能做直角边分别为3分米和2分米的三角形小旗多少面？
<gadget id="calculator">3 * 10</gadget>
<output>30</output>

<gadget id="calculator">30 / 3</gadget>
<output>10</output>

<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<gadget id="calculator">10 * 6 * 2</gadget>
<output>120</output>

<result>120</result>