The school planned to use 300,000 yuan to decorate the classroom, but the actual cost was less than the plan (1/10). How much did the decoration actually cost?
学校装修教室，计划用30万元，实际花费比计划节约了(1/10)，实际装修花了多少元？
<gadget id="calculator">1 / 10</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">30 * (9/10)</gadget>
<output>27</output>

<result>27</result>