There are 40 pear trees, as many poplars as there are pear trees (5/8), and as many pear trees as willows (4/7). How many trees are there in total?
梨树有40棵，杨树的棵数是梨树的(5/8)，梨树的棵数是柳树的(4/7)．三种树木共有多少棵？
<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">40 * (5/8)</gadget>
<output>25</output>

<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">40 / (4/7)</gadget>
<output>70</output>

<gadget id="calculator">25 + 70 + 40</gadget>
<output>135</output>

<result>135</result>