For a piece of land, use it for growing cabbage (5/9), use it for growing radish (4/11), and use the rest for green vegetables. How much of this land is used for growing vegetables?
一块地，种白菜用去它的(5/9)，种萝卜用去它的(4/11)，其余的种青菜．种青菜用去这块地的几分之几？
<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">4 / 11</gadget>
<output>4/11 = around 0.363636</output>

<gadget id="calculator">1 - (5/9) - (4/11)</gadget>
<output>8/99 = around 0.080808</output>

<result>8/99 = around 0.080808</result>