The output value of a factory in the first half of the year is 5 million yuan, and the output value in the second half of the year is less than that in the first half of the year (1/10). How much is the output value of the factory in the second half of the year? (answer in two ways)
某工厂上半年的产值是500万元，下半年的产值比上半年少(1/10)，该工厂下半年的产值是多少万元？(用两种方法解答)
<gadget id="calculator">500 / 500</gadget>
<output>1</output>

<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">1 / 500</gadget>
<output>1/500 = around 0.002</output>

<gadget id="calculator">(9/10) / (1/500)</gadget>
<output>450</output>

<result>450</result>