There are 85 roses in the park, and 10 peony flowers are 3 times less than the rose flowers. How many peonies are there in the park?
公园里有月季花85棵，牡丹花比月季花的3倍少10棵，公园里有牡丹花多少棵？
<gadget id="calculator">85 * 3</gadget>
<output>255</output>

<gadget id="calculator">255 - 10</gadget>
<output>245</output>

<result>245</result>