The height of a cuboid is 5 cm. If its height increases by 2cm, its volume increases by 18cm**3. So what is the volume of the original rectangle in cm**3.
一个长方体的高是5cm．如果它的高增加2cm，则体积就增加18cm**3．那么原来这个长方形的体积是多少cm**3．
<gadget id="calculator">18 / 2</gadget>
<output>9</output>

<gadget id="calculator">9 * 5</gadget>
<output>45</output>

<result>45</result>