There are 420 trees in the park, among which willows account for 2/7 of the total, and the rest are poplars and pagoda trees. The ratio of poplars to pagoda trees is 2:3. How many pagoda trees are there?
公园里有树420棵，其中柳树占总数的(2/7)，其余的是杨树和槐树，杨树和槐树的比是2：3，槐树有多少棵？
<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">1 - (2/7)</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">420 * (5/7) * (3/5)</gadget>
<output>180</output>

<result>180</result>