There are 102 pots of roses in the flower shop, and the number of pots of chrysanthemums is 5 times that of roses. Roses are 204 pots less than chrysanthemums, how many pots are there roses?
花店里有月季花102盆，菊花的盆数是月季花的5倍．玫瑰花比菊花少204盆，玫瑰花有多少盆？
<gadget id="calculator">102 * 5</gadget>
<output>510</output>

<gadget id="calculator">510 - 204</gadget>
<output>306</output>

<result>306</result>