The length of a wall brick is (4/5) meters, and the width is long (3/4), what is the area of this wall brick in square meters?
一块墙砖的长是(4/5)米，宽是长的(3/4)，这块墙砖的面积是多少平方米．
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

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

<gadget id="calculator">(4/5) * (3/4) * (4/5)</gadget>
<output>12/25 = around 0.48</output>

<result>12/25 = around 0.48</result>