There are 8040 fruit trees in total, among which there are 14 rows of apple trees with 420 trees in each row. The rest are peach trees. It is known that there are 18 rows of peach trees. How many peach trees are in each row?
一共有8040棵果树，其中苹果树有14行，每行420棵．其余的都是桃树，已知桃树18行，桃树每行多少棵？
<gadget id="calculator">14 * 420</gadget>
<output>5_880</output>

<gadget id="calculator">8_040 - 5_880</gadget>
<output>2_160</output>

<gadget id="calculator">2_160 / 18</gadget>
<output>120</output>

<result>120</result>