The effective range of a heavy machine gun is 1500 meters. If it shoots horizontally at 60°, how many square meters is its effective shooting area?
重机枪的有效射程是1500米，若它作60°的水平扫射，则它的有效扫射面积为多少平方米．
<gadget id="calculator">60 / 360</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1_500 ** 2</gadget>
<output>2_250_000</output>

<gadget id="calculator">(1/6) * 3.14 * 2_250_000</gadget>
<output>1_177_500</output>

<result>1_177_500</result>