There is a rectangular vegetable field, 30.2 meters long. The width is 15.5 meters, and a path with a width of 1.5 meters is built around it. Find the area of the path.
有一块长方形菜地，长30.2米．宽15.5米，在它的四周向外修一条宽1.5米的小路，求小路的面积．
<gadget id="calculator">30.2 + 1.5 + 1.5</gadget>
<output>33.2</output>

<gadget id="calculator">15.5 + 1.5 + 1.5</gadget>
<output>18.5</output>

<gadget id="calculator">33.2 * 18.5</gadget>
<output>614.2</output>

<gadget id="calculator">30.2 * 15.5</gadget>
<output>468.1</output>

<gadget id="calculator">614.2 - 468.1</gadget>
<output>146.1</output>

<result>146.1</result>