A factory produces 36,000 pieces of products this year, an increase of (1/4) compared with last year. How many pieces were produced last year?
某厂今年生产产品36000件，比去年增产了(1/4)，去年生产了多少件？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">36_000 / (5/4)</gadget>
<output>28_800</output>

<result>28_800</result>