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## Dog Years
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### Instructions
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Someone once said that a dog makes 7 years for each human year.
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Create a `dogYears` function that if given a planet name and an age in seconds,
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calculates how old a dog would be on the given planet.
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- `earth` : orbital period 1.0 Earth years, 365.25 Earth days, or 31,557,600 seconds
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- `mercury` : orbital period 0.2408467 Earth years
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- `venus` : orbital period 0.61519726 Earth years
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- `mars` : orbital period 1.8808158 Earth years
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- `jupiter` : orbital period 11.862615 Earth years
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- `saturn` : orbital period 29.447498 Earth years
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- `uranus` : orbital period 84.016846 Earth years
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- `neptune` : orbital period 164.79132 Earth years
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So if you were told someone that their dog were 1,000,000,000 seconds old, you should be able to say that the dog is 221.82 Earth-years old.
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You will have to format the number so that the result is rounded like the example above.
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