A piece of red cloth is 40 meters long and 2 meters wide. Use it to make two small isosceles right-angled triangle flags whose right-angled sides are 4 decimeters, how many sides can be made?
一块红布长40米，宽2米．用它做两条直角边都是4分米的等腰直角三角形小旗，可以做多少面？
<gadget id="calculator">40 * 2</gadget>
<output>80</output>

<gadget id="calculator">0.4 * 0.4</gadget>
<output>0.16</output>

<gadget id="calculator">80 / 0.16</gadget>
<output>500</output>

<gadget id="calculator">500 * 2</gadget>
<output>1_000</output>

<result>1_000</result>