On both sides of a 1500-meter-long road, one pole is erected on each side every 30 meters from the beginning to the end. How many poles need to be erected in total?
在一条1500米长的公路两旁，从头到尾每隔30米在两边分别架设一根电线杆，一共需要架设多少根电线杆？
<gadget id="calculator">1_500 / 30</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>