A piece of triangular land has a base of 480 meters and a height of 240 meters. Use (1/3) of this land to grow cotton. How many hectares are there cotton fields?
一块三角形土地，底是480米，高是240米，用这块地的(1/3)种棉花．棉花地有多少公顷？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/3) / 10_000</gadget>
<output>1/30_000 = around 0.000033</output>

<gadget id="calculator">(1/2) * 480 * 240 * (1/30_000)</gadget>
<output>48/25 = around 1.92</output>

<result>48/25 = around 1.92</result>