The school grows roses and roses as ornamental plants. The number of roses is 20 less than that of roses (3/7). There are 130 roses. How many roses are planted?
学校种月季和玫瑰两种观赏植物，玫瑰的株数比月季的(3/7)少20株，玫瑰种了130株，月季种了多少株？
<gadget id="calculator">130 + 20</gadget>
<output>150</output>

<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">150 / (3/7)</gadget>
<output>350</output>

<result>350</result>