There are 480 fruit trees in an orchard, of which apple trees account for 17%, pear trees account for 25%, and peach trees account for 28%. The rest are apricot trees. How many apricot trees are there?
一个果园共有果树480棵，其中苹果树占17%，梨树占25%，桃树占28%．其余的是杏树，杏树有多少棵？
<gadget id="calculator">17 / 100</gadget>
<output>17/100 = around 0.17</output>

<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">28 / 100</gadget>
<output>7/25 = around 0.28</output>

<gadget id="calculator">1 - (17/100) - (1/4) - (7/25)</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">480 * (3/10)</gadget>
<output>144</output>

<result>144</result>