A cuboid is 7.5 meters long, 1/4 more than its height, and its width is 40% of its length. What is the volume of this cuboid in cubic decimeters?
一个长方体，长是7.5米，比高多(1/4)，宽是长的40%．这个长方体的体积是多少立方分米？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">7.5 / (5/4)</gadget>
<output>6</output>

<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">7.5 * 6 * 7.5 * (2/5) * 1_000</gadget>
<output>135_000</output>

<result>135_000</result>