There are 360 lychee trees in the orchard, and the number of lychee trees is 60 less than three times the number of longan trees. How many longan trees are there? (solution with equation)
果园里有荔枝树360棵，荔枝树棵数比龙眼树棵数的3倍少60棵，龙眼树有多少棵？(用方程解答)
<gadget id="calculator">360 + 60</gadget>
<output>420</output>

<gadget id="calculator">420 / 3</gadget>
<output>140</output>

<result>140</result>