Xiaoli's mother bought 270 cubic meters of gas this month, which has been used up (2/9), how many cubic meters of gas are left?
小丽的妈妈本月买煤气270方，已经用去(2/9)，还剩下多少方煤气？
<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">1 - (2/9)</gadget>
<output>7/9 = around 0.777778</output>

<gadget id="calculator">270 * (7/9)</gadget>
<output>210</output>

<result>210</result>