A chemical plant produces 27 tons of industrial sewage every day, of which (8/9) has been treated, how many tons of untreated sewage?
某化工厂每天产生27吨的工业污水，其中有(8/9)的污水经过处理，未经处理的污水有多少吨？
<gadget id="calculator">8 / 9</gadget>
<output>8/9 = around 0.888889</output>

<gadget id="calculator">1 - (8/9)</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">27 * (1/9)</gadget>
<output>3</output>

<result>3</result>