A park needs to install lights around a square lawn with a side length of 80 meters. If one is installed every 10 meters, and there must be one at each corner, how many lights will be installed in total?
某公园要在边长为80米的正方形草地的四周都安装上照明灯，如果每隔10米装1座，并且每个角都要有一座，这样一共要装多少座．
<gadget id="calculator">80 / 10</gadget>
<output>8</output>

<gadget id="calculator">8 + 1</gadget>
<output>9</output>

<gadget id="calculator">9 * 4</gadget>
<output>36</output>

<gadget id="calculator">36 - 4</gadget>
<output>32</output>

<result>32</result>