Mom wants to make a protective cloth for a round table with a circumference of 37.68 decimeters. If the price of the protective cloth per square meter is 25 yuan, how much does mother need to make this protective cloth at least?
妈妈要给一个周长37.68分米的圆桌做一块护布，如果每平方米护布的价钱是25元，妈妈做这块护布至少需要多少钱？
<gadget id="calculator">37.68 / 3.14 / 2 / 10</gadget>
<output>0.6</output>

<gadget id="calculator">0.6 ** 2</gadget>
<output>0.36</output>

<gadget id="calculator">3.14 * 0.36 * 25</gadget>
<output>28.26</output>

<result>28.26</result>