There is a rectangular piece of cardboard with a length of 30 cm and a width of 20 cm, and a square with a side length of 5 cm is cut from each of the four corners to make a carton. What is the volume of the carton in cubic centimeters?
有一张长30厘米，宽20厘米的长方形硬纸片，从四个角各剪去边长为5厘米的正方形，做成纸盒．该纸盒的容积为多少立方厘米？
<gadget id="calculator">5 * 2</gadget>
<output>10</output>

<gadget id="calculator">30 - 10</gadget>
<output>20</output>

<gadget id="calculator">20 - 10</gadget>
<output>10</output>

<gadget id="calculator">20 * 10 * 5</gadget>
<output>1_000</output>

<result>1_000</result>