A piece of velvet is 30 meters long and 1.5 meters wide. If you use it to make two right-angled triangle flags with 5 decimeters on each side, how many sides can you make?
一块绒布长30米，宽1.5米，用它做两条直角边都是5分米的直角三角形小旗，可以做多少面？
<gadget id="calculator">30 * 1.5</gadget>
<output>45</output>

<gadget id="calculator">0.5 * 0.5</gadget>
<output>0.25</output>

<gadget id="calculator">45 / 0.25</gadget>
<output>180</output>

<gadget id="calculator">180 * 2</gadget>
<output>360</output>

<result>360</result>