There are 480 pear trees and peach trees in the orchard. The number of pear trees is three times that of peach trees. How many pear trees are there? (Solution of column equation).
果园里共有梨树和桃树480棵，梨树的棵数是桃树的3倍，梨树有多少棵？(列方程解)．
<gadget id="calculator">1 + 3</gadget>
<output>4</output>

<gadget id="calculator">480 / 4</gadget>
<output>120</output>

<gadget id="calculator">480 - 120</gadget>
<output>360</output>

<result>360</result>