project, with a planned cost of 300,000 yuan, was actually saved by 10% when it was completed. What is the actual cost of this project?
一项工程，计划造价是30万元，实际完工时节约了10%，这项工程的实际造价是多少万元．
<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">30 * (9/10)</gadget>
<output>27</output>

<result>27</result>