Cut a rectangular iron sheet with a length of 30 cm and a width of 25 cm, cut off a square with a side length of 5 cm from the four corners, and then weld it into a cuboid iron box without a cover. What is the volume of this iron box in cubic centimeters?
把一块长30厘米、宽25厘米的长方形铁皮，从四个角剪去边长5厘米的正方形，再焊接成一个无盖的长方体铁盒．这个铁盒的容积是多少立方厘米？
<gadget id="calculator">5 * 2</gadget>
<output>10</output>

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

<gadget id="calculator">25 - 10</gadget>
<output>15</output>

<gadget id="calculator">20 * 15 * 5</gadget>
<output>1_500</output>

<result>1_500</result>