Teacher Ma is walking on the riverside avenue at a constant speed, and the distance between two adjacent lampposts on the roadside is equal. It took him 160 seconds to walk from the first pillar to the fifth pillar. According to this calculation, Mr. Ma walked for a total of 240 seconds, which lamp post should he walk to?
马老师以不变的速度在河滨大道上散步，路边相邻的两根灯柱之间的距离都相等．他从第一根柱旁走到第5根柱旁用了160秒的时间．照这样计算，马老师一共走240秒，应该走到第几根灯柱旁？
<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">160 / 4</gadget>
<output>40</output>

<gadget id="calculator">240 / 40</gadget>
<output>6</output>

<gadget id="calculator">6 + 1</gadget>
<output>7</output>

<result>7</result>