How many kilograms of soybeans can be contained in a cube container with a side length of 40 cm. (The thickness of the container wall is not counted, and the weight of soybeans per cubic meter is 750 kg)
一个棱长为40厘米的正方体容器里，可以装黄豆多少千克．(容器壁厚度不计，每立方米黄豆重750千克)
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(2/5) * (2/5) * (2/5) * 750</gadget>
<output>48</output>

<result>48</result>