A right triangle, the three sides are (3/20) meters, (1/4) meters, (1/5) meters, what is the area of this triangle in square meters?
一个直角三角形，三条边分别长(3/20)米，(1/4)米，(1/5)米，这个三角形的面积是多少平方米．
<gadget id="calculator">3 / 20</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) / 2</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(3/20) * (1/10)</gadget>
<output>3/200 = around 0.015</output>

<result>3/200 = around 0.015</result>