There is a conical wooden block, its volume is 150dm**3, its height is 10dm, what is the area of its bottom dm**2.
有一个圆锥形木块，它的体积是150dm**3，高是10dm，它的底面积是多少dm**2．
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">150 * (3/10)</gadget>
<output>45</output>

<result>45</result>