Install street lamps on both sides of a 150-meter-long bridge, one at every 10 meters, and at both ends. How many lights are needed in total?
在一架长150米的桥的两侧安装路灯，每隔10米装1盏，两端都装，一共需要多少盏灯？
<gadget id="calculator">150 / 10</gadget>
<output>15</output>

<gadget id="calculator">15 + 1</gadget>
<output>16</output>

<gadget id="calculator">16 * 2</gadget>
<output>32</output>

<result>32</result>