Chenzhuang Primary School has a small playground with a length of 60 meters and a width of 40 meters. There are trees planted at the four vertices, one tree is planted every 10 meters on the long side, and one tree is planted every 8 meters on the wide side. How many trees are planted around the playground?
陈庄小学有一个长60米、宽40米的小操场，四个顶点都种有一棵树，长边上每隔10米种一棵，宽边上每隔8米种一棵．操场四周一共种树多少棵？
<gadget id="calculator">60 / 10</gadget>
<output>6</output>

<gadget id="calculator">40 / 8</gadget>
<output>5</output>

<gadget id="calculator">6 + 5</gadget>
<output>11</output>

<gadget id="calculator">11 * 2</gadget>
<output>22</output>

<result>22</result>