There are 234 pots of peonies in the park, which is three times that of chrysanthemums, and the number of pots of rose flowers is twice that of chrysanthemums. How many pots of roses are there in the park?
公园里有牡丹花234盆，是菊花的3倍，月季花的盆数是菊花的2倍．公园里有多少盆月季花？
<gadget id="calculator">234 / 3</gadget>
<output>78</output>

<gadget id="calculator">78 * 2</gadget>
<output>156</output>

<result>156</result>