There were 2,840 primary school students in a certain town last year, and this year it has decreased (3/20) compared to last year. How many primary school students are there this year?
某镇去年有小学生2840人，今年比去年减少了(3/20)，今年有小学生多少人？
<gadget id="calculator">3 / 20</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">1 - (3/20)</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">2_840 * (17/20)</gadget>
<output>2_414</output>

<result>2_414</result>