A cone has a volume of 18 cubic meters and a height of 1.8 meters. What is the area of the base of this cone?
一个圆锥体，体积是18立方米，高1.8米．请问这个圆锥的底面积是多少？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">18 / (1/3) / 1.8</gadget>
<output>30</output>

<result>30</result>