A channel is 45 meters long. From the start to the end, a colored pole is erected every 1.5 meters. How many poles should be erected in total?
一条通道长45米，从起点到终点，每1.5米立一根彩杆，一共要立多少根．
<gadget id="calculator">45 / 1.5</gadget>
<output>30</output>

<gadget id="calculator">30 + 1</gadget>
<output>31</output>

<result>31</result>