Lixin Primary School expanded the campus, with an actual investment of 120,000 yuan, which was more than planned (1/5). How much is the original plan to invest?
立新小学扩建校园，实际投资12万元，比计划多投资(1/5)．原计划投资多少万元？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">12 / (6/5)</gadget>
<output>10</output>

<result>10</result>