There are 140 apple trees in the orchard, 40 fewer than 4 times the number of ginkgo trees. How many ginkgo trees are there? (solution in two ways)
果园里有苹果树140棵，比银杏树的4倍少40棵．银杏树有多少棵？(用两种方法解)
<gadget id="calculator">140 + 40</gadget>
<output>180</output>

<gadget id="calculator">180 / 4</gadget>
<output>45</output>

<result>45</result>