A cuboid piece of wood has a cross-section of a square with side length 40 cm, and the length of the wood is 15 decimeters. What is the volume of this piece of wood?
一根长方体木料，横截面是边长为40厘米的正方形，木料长15分米．这根木料的体积是多少？
<gadget id="calculator">15 * 10</gadget>
<output>150</output>

<gadget id="calculator">40 * 40 * 150</gadget>
<output>240_000</output>

<result>240_000</result>