A chimney has a side area of 9.42 square meters and a length of 2 meters. What is the radius of its bottom in meters?
一节烟囱的侧面积为9.42平方米，长为2米，它的底面半径是多少米．
<gadget id="calculator">9.42 / 3.14 / 2 / 2</gadget>
<output>0.75</output>

<result>0.75</result>