A certain school greens the campus with metasequoia, cypress, and plane trees. Among them, the number of metasequoia trees is 40% of the total, the number of cypress trees is metasequoia (7/8), and the rest are plane trees. It is known that there are 144 more metasequoias than sycamores. How many metasequoias are there?
某校绿化校园植了水杉，柏树、梧桐三种树，其中种植水杉的棵数为总数的40%，柏树的棵数是水杉的(7/8)，其余的是梧桐树．已知水杉比梧桐多144棵，水杉是多少棵？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">(2/5) * (7/8)</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">1 - (2/5) - (7/20)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(2/5) - (1/4)</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">144 / (3/20)</gadget>
<output>960</output>

<gadget id="calculator">960 * (2/5)</gadget>
<output>384</output>

<result>384</result>