The number of apple trees in the orchard is three times that of peach trees. The administrator can spray pesticides on 25 apple trees and 15 peach trees every day. A few days later, when the peach trees are sprayed with pesticide, there are still 140 apple trees that have not been sprayed. , How many peach trees are there in the orchard?
果园里的苹果树是桃树的3倍，管理员每天能给25棵苹果树和15棵桃树洒农药，几天后，当桃树喷完农药时，苹果树还有140棵没有喷药，果园里共有多少棵桃树？
<gadget id="calculator">15 * 3</gadget>
<output>45</output>

<gadget id="calculator">45 - 25</gadget>
<output>20</output>

<gadget id="calculator">140 / 20</gadget>
<output>7</output>

<gadget id="calculator">15 * 7</gadget>
<output>105</output>

<result>105</result>