There is a 40-meter-long path between the two buildings. Now it is necessary to set up a telephone pole every 8 meters on both sides of the path. How many telephone poles are needed in total?
两幢大楼之间有一条长40米的小路．现在要在小路两旁每隔8米设一根电线杆，一共需要设多少根电线杆．
<gadget id="calculator">40 / 8</gadget>
<output>5</output>

<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">4 * 2</gadget>
<output>8</output>

<result>8</result>