To do a project, the actual investment is 4.8 million yuan, which is (1/5) less than the plan. How much is the planned investment?
做一项工程，实际投资了480万元，比计划节约了(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">480 / (4/5)</gadget>
<output>600</output>

<result>600</result>