The rectangular flower bed is 18 meters long and 16 meters wide, and a path with a width of 1 meter should be paved around it. What is the area of this path in square meters?
长方形花坛长18米，宽16米，要在它四周铺上宽1米的小路．这条小路的面积是多少平方米？
<gadget id="calculator">18 + 1 + 1</gadget>
<output>20</output>

<gadget id="calculator">16 + 1 + 1</gadget>
<output>18</output>

<gadget id="calculator">20 * 18</gadget>
<output>360</output>

<gadget id="calculator">18 * 16</gadget>
<output>288</output>

<gadget id="calculator">360 - 288</gadget>
<output>72</output>

<result>72</result>