corn field produces 450 kilograms of corn this year, which is 1/4 more than last year. How many kilograms of corn was produced last year?
一块玉米地，今年产玉米450千克，比去年增产(1/4)，去年产玉米多少千克？
<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">450 / (5/4)</gadget>
<output>360</output>

<result>360</result>