To build a teaching building, the actual investment is 1.2 million yuan, which is 1/5 less than the planned investment. How much is the planned investment?
建造一幢教学大楼，实际投资120万元，比计划投资节省(1/5)，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>4/5 = around 0.8</output>

<gadget id="calculator">120 / (4/5)</gadget>
<output>150</output>

<result>150</result>