There is a rectangular parallelepiped glass container, measured from the inside (16/13) decimeters long, (39/28) decimeters wide, and 3 decimeters high, if water is poured into this container, the water in the container will form a rectangular parallelepiped second What is the volume of water in cubic decimeters when a group of opposite sides is a square.
有一个长方体玻璃容器，从里面量长(16/13)分米，宽(39/28)分米，高3分米，如果向这个容器里注水，使容器中的水所形成的长方体第二次出现一组对面是正方形时，水的体积是多少立方分米．
<gadget id="calculator">16 / 13</gadget>
<output>16/13 = around 1.230769</output>

<gadget id="calculator">39 / 28</gadget>
<output>39/28 = around 1.392857</output>

<gadget id="calculator">(16/13) * (39/28) * (39/28)</gadget>
<output>117/49 = around 2.387755</output>

<result>117/49 = around 2.387755</result>