triangle vegetable field is 150 meters long and 120 meters high. If it is drawn on a drawing with a scale of 1:3000, what is the area in square centimeters drawn on the drawing?
一块三角形菜地底边长150米，高120米，如果把它画在比例尺为1：3000的图纸上，画在图上的面积是多少平方厘米．
<gadget id="calculator">1 / 3_000</gadget>
<output>1/3_000 = around 0.000333</output>

<gadget id="calculator">(1/3_000) / 2</gadget>
<output>1/6_000 = around 0.000167</output>

<gadget id="calculator">150 * 100 * (1/3_000) * 120 * 100 * (1/6_000)</gadget>
<output>10</output>

<result>10</result>