Our school plans to invest 3 million yuan in the new teaching building, which actually saves 10% compared to the original plan. How much is the actual investment?
我校新建教学楼计划投资300万，实际比原计划节约了10%，实际投资了多少万元？
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">300 * (9/10)</gadget>
<output>270</output>

<result>270</result>