Guangming Machinery Factory planned to produce 1,800 machine tools last year, but actually produced (1/5) of the plan in the first two months. According to this calculation, how many months can it be completed in advance?
光明机械厂去年计划生产机床1800台，实际头2个月就生产了计划的(1/5)，照这样计算，可提前几个月完成？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) / 2</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 / (1/10)</gadget>
<output>10</output>

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

<result>2</result>