The automobile factory produced 26,400 vehicles in the first half of the year, completing 60% of the annual plan. According to this calculation, the annual plan can be completed several months in advance?
汽车厂上半年生产汽车2.64万辆，完成了全年计划的60%．照这样计算，可以提前几个月完成全年计划？
<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">6 / (3/5)</gadget>
<output>10</output>

<gadget id="calculator">12 - 10</gadget>
<output>2</output>

<result>2</result>