If a cuboid has a base area of 30 decimeters and a height of 4 decimeters, what is its volume in cubic decimeters?
一个长方体的底面积是30平方分米，高是4分米，它的体积是多少立方分米．
<gadget id="calculator">30 * 4</gadget>
<output>120</output>

<result>120</result>