The orchard contracted by Uncle Wang has three kinds of fruit trees: peach, pear, and apple. Pear trees account for 1/4 of the total. It is 2:5. How many fruit trees are there in total?
王叔叔承包的果园罩有桃树、梨树、苹果树三种果树，梨树占总数的(1/4)梨树与桃树一共有150棵，桃树与其他两种树的棵树比是2：5．三种果树共有多少棵？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">2 + 5</gadget>
<output>7</output>

<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">(1/4) + (2/7)</gadget>
<output>15/28 = around 0.535714</output>

<gadget id="calculator">150 / (15/28)</gadget>
<output>280</output>

<result>280</result>