There is a rectangular lawn in the park, which is 0.5 km long and 0.35 km wide. What is the area of this lawn in square meters?
公园有一块长方形草坪，长0.5千米，宽0.35千米，这个草坪的面积是多少平方米？
<gadget id="calculator">0.5 * 1_000</gadget>
<output>500</output>

<gadget id="calculator">0.35 * 1_000</gadget>
<output>350</output>

<gadget id="calculator">500 * 350</gadget>
<output>175_000</output>

<result>175_000</result>