Bougainvillea is planted around the rectangular lawn in Lijing Community, with 18 plants on each side of the long side and 10 plants on each side of the short side (one plant at each of the four vertices of the lawn). How many bougainvilleas are there in total around the lawn?
丽景小区长方形草坪四周栽有三角梅，长边每边有18株，短边每边有10株(草坪四个顶点上各有1株)．草坪周围一共有多少株三角梅？
<gadget id="calculator">18 - 1</gadget>
<output>17</output>

<gadget id="calculator">17 * 2</gadget>
<output>34</output>

<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">9 * 2</gadget>
<output>18</output>

<gadget id="calculator">34 + 18</gadget>
<output>52</output>

<result>52</result>