There are 180 willow trees in the park, and pine trees are 15% less than willow trees. How many trees are there in total?
公园里有柳树180棵，松树比柳树少15%，两种树一共有多少棵？
<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">1 - (3/20)</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">180 * (17/20)</gadget>
<output>153</output>

<gadget id="calculator">153 + 180</gadget>
<output>333</output>

<result>333</result>