A real estate group invested 18 million yuan to build a Shangri-La residential garden, saving (1/9) compared to the original planned investment. How much is the original plan to invest?
某地产集团投资1800万元建设香格里拉住宅花园，比原计划投资节约了(1/9)．原计划投资多少万元？
<gadget id="calculator">1 / 9</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">1 - (1/9)</gadget>
<output>8/9 = around 0.888889</output>

<gadget id="calculator">1_800 / (8/9)</gadget>
<output>2_025</output>

<result>2_025</result>