The apples in the fruit shop are now 7.9 yuan per kilogram, which is 1.6 yuan cheaper than before. How much yuan per kilogram used to be?
水果店的苹果现在每千克7.9元，比原来便宜了1.6元，原来每千克多少元？
<gadget id="calculator">7.9 + 1.6</gadget>
<output>9.5</output>

<result>9.5</result>