The Academy of Agricultural Sciences has a rectangular experimental field. If the length is increased by 8 meters or the width is increased by 5 meters, the area will be increased by 80 square meters compared to the original area. How many square meters is the original area of the experimental field?
农科院有一块长方形试验田，如果长增加8米，或者宽增加5米，面积比原来增加80平方米，原来试验田的面积是多少平方米？
<gadget id="calculator">80 / 5</gadget>
<output>16</output>

<gadget id="calculator">80 / 8</gadget>
<output>10</output>

<gadget id="calculator">16 * 10</gadget>
<output>160</output>

<result>160</result>