If a gardener wants to plant lawns on a rectangular piece of land with a length of 18 meters and a width of 10 meters, how many square meters of turf do they need to buy?
园林工人要在一块长为18米，宽为10米的长方形的土地上种植草坪，需购买多少平方米的草皮？
<gadget id="calculator">18 * 10</gadget>
<output>180</output>

<result>180</result>