A cuboid goldfish tank, measured from the inside, is (4/5) meters long, (1/4) meters wide, and (1/2) meters high, and the water depth inside is (3/10) meters, how many cubic decimeters of water is in the fish tank ?
一个长方体金鱼缸，从里面量，长(4/5)米，宽(1/4)米，高(1/2)米，里面水深(3/10)米，鱼缸里有水多少立方分米？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">(4/5) * (1/4) * (3/10) * 1_000</gadget>
<output>60</output>

<result>60</result>