There is a 100-meter-long road in Zijin Park. From the beginning to the end, there are fruit bins on both sides, one on each side at an interval of 20 meters. How many fruit bins are there in total on this road?
紫金公园里有一条长100米的路，从头到尾两侧都要放果皮箱，每侧隔20米放一个，这条路一共要放多少个果皮箱．
<gadget id="calculator">100 / 20</gadget>
<output>5</output>

<gadget id="calculator">5 + 1</gadget>
<output>6</output>

<gadget id="calculator">6 * 2</gadget>
<output>12</output>

<result>12</result>