A cuboid goldfish bowl, measured from the inside, is (4/5) meters long, (1/4) meters wide, and (1/2) meters high. The water depth of the fish tank is (3/10) meters. How many cubic meters of water are there in the fish tank?
一个长方体的金鱼缸，从里面量，长(4/5)米，宽(1/4)米，高(1/2)米．鱼缸水深(3/10)米．鱼缸里有水多少立方米？
<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)</gadget>
<output>3/50 = around 0.06</output>

<result>3/50 = around 0.06</result>