It costs 25 yuan to pave 1 square meter of lawn, and how much does it cost to pave a rectangular lawn with a length of 45 meters and a width of 20 meters?
铺1平方米的草坪需要25元，铺一块长45米，宽20米的长方形草坪需要多少元？
<gadget id="calculator">45 * 20 * 25</gadget>
<output>22_500</output>

<result>22_500</result>