The fruit farm harvested a total of 42,000 kilograms of apples this year, an increase of 5% over last year. How many kilograms of apples were harvested last year?
果林场今年共收苹果42000千克，比去年增产5%，去年收苹果多少千克？
<gadget id="calculator">5 / 100</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">1 + (1/20)</gadget>
<output>21/20 = around 1.05</output>

<gadget id="calculator">42_000 / (21/20)</gadget>
<output>40_000</output>

<result>40_000</result>