piece of cuboid steel is 15 decimeters in length, 6 decimeters in width and 5 decimeters in height. If the two largest cubes are to be cut off (without welding and cutting), how many cubic decimeters of steel should be left.
一块长方体钢材，长15分米、宽6分米、高5分米、要截去两个最大的正方体(不焊接割补)，应剩余多少立方分米钢材．
<gadget id="calculator">15 * 6 * 5</gadget>
<output>450</output>

<gadget id="calculator">5 * 5 * 5 * 2</gadget>
<output>250</output>

<gadget id="calculator">450 - 250</gadget>
<output>200</output>

<result>200</result>