A flower bed (4/7) is planted with roses, and the rest are planted with tulips. How much do tulips occupy in this field?
一块花坛地的(4/7)种了玫瑰，其余的种郁金香，郁金香占这块地的多少．
<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">1 - (4/7)</gadget>
<output>3/7 = around 0.428571</output>

<result>3/7 = around 0.428571</result>