On Mother's Day, the love flower shop sold 320 carnations, 7 less than three times the sales of roses. How many roses are sold in the flower shop?
母亲节那天情之缘花店销售了康乃馨320株，比玫瑰销量的3倍少7株，花店里销售玫瑰多少株？
<gadget id="calculator">320 + 7</gadget>
<output>327</output>

<gadget id="calculator">327 / 3</gadget>
<output>109</output>

<result>109</result>