A rectangular cardboard is (8/15) decimeters long and (3/4) wide. What is the area of the cardboard square?
一个长方形纸板，长(8/15)分米，宽是长的(3/4)，这个纸板的面积是多少平方分米？
<gadget id="calculator">8 / 15</gadget>
<output>8/15 = around 0.533333</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(8/15) * (8/15) * (3/4)</gadget>
<output>16/75 = around 0.213333</output>

<result>16/75 = around 0.213333</result>