The area of Tiananmen Square is about 440,000 square meters, or how many acres.
天安门广场的面积约为44万平方米，合多少亩．
<gadget id="calculator">44 * 10_000</gadget>
<output>440_000</output>

<gadget id="calculator">440_000 * 0.0015</gadget>
<output>660</output>

<result>660</result>