There is a square lawn, and a 1-meter-wide path is built around the lawn. The area of the road is 80 square meters. Find the area of the lawn.
有一个正方形草坪，给草坪四周向外修1米宽小路，路面面积是80平方米，求草坪面积．
<gadget id="calculator">1 * 1 * 4</gadget>
<output>4</output>

<gadget id="calculator">80 - 4</gadget>
<output>76</output>

<gadget id="calculator">76 / 4 / 1</gadget>
<output>19</output>

<gadget id="calculator">19 * 19</gadget>
<output>361</output>

<result>361</result>