The area of a circle is 314 square centimeters, what is its radius in decimeters
一个圆的面积是314平方厘米，它的半径是多少分米
<gadget id="calculator">10 * 10</gadget>
<output>100</output>

<gadget id="calculator">100 / 100</gadget>
<output>1</output>

<result>1</result>