The specifications of the red scarf are 100 cm at the bottom and 30 cm high. Think about how many square decimeters of red fabric are needed to make one for each of the first-grade children (160 people)?
红领巾的规格是底为100厘米、高为30厘米，想一想给一年级的小朋友(160人)每人做1条，所需要红色的布料多少平方分米呢？
<gadget id="calculator">30 / 2</gadget>
<output>15</output>

<gadget id="calculator">160 / 100</gadget>
<output>8/5 = around 1.6</output>

<gadget id="calculator">100 * 15 * (8/5)</gadget>
<output>2_400</output>

<result>2_400</result>