A cuboid is 50 cm long and 30 cm wide. If a square with a side length of 5 cm is cut from the four corners and folded into a box without a lid, what is the volume of the box without a lid?
一个长方体铁皮长50厘米，宽30厘米．如果从四个角剪去边长5厘米的正方形，再折成一个无盖的盒子，这个无盖盒子的容积是多少？
<gadget id="calculator">5 * 2</gadget>
<output>10</output>

<gadget id="calculator">50 - 10</gadget>
<output>40</output>

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

<gadget id="calculator">40 * 20 * 5</gadget>
<output>4_000</output>

<result>4_000</result>