The school plans to invest 3 million yuan to build a teaching building, but the actual saving is 40% compared to the plan. How much is the actual investment?
学校建教学楼，计划投资300万元，实际比计划节约了40%，实际投资多少万元？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">300 * (3/5)</gadget>
<output>180</output>

<result>180</result>