Install street lamps on both sides of a 300-meter street, and install one lamp every 6 meters (both ends must be installed). How many street lamps should be installed in total?
在一条300米的街道两旁安装路灯，每隔6米安装一盏(两端都要装)，一共要安装多少盏路灯．
<gadget id="calculator">300 / 6</gadget>
<output>50</output>

<gadget id="calculator">50 + 1</gadget>
<output>51</output>

<gadget id="calculator">51 * 2</gadget>
<output>102</output>

<result>102</result>