A triangular cardboard has a base length of (2/5) meters and a height of (3/4) meters. What is its area in square meters?
一个三角字形纸板，底长(2/5)米，高(3/4)米，它的面积是多少平方米？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

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

<gadget id="calculator">(3/4) / 2</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">(2/5) * (3/8)</gadget>
<output>3/20 = around 0.15</output>

<result>3/20 = around 0.15</result>