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Calendar

Perpetual calendar

jak obliczyć dzień tygodnia na podstawie daty?
Calculator gives what day of the week for the date specified by the user.                  

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Calculator of days

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Health

Calculator burn calories (kcal). How many calories you burn a day?

Ile kalorii spalamy? Ile kalorii potrzebuję?
The calculator calculates how many calories you burn per day based on the data entered.
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Number of tetrahedral

Tetrahedral numbers are the natural numbers, for which it is possible to construct a tetrahedron formnego of bullets. They are a special case of the pyramidal numbers.        
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Life

Calculate how much you drink pure ethanol

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Calculator floor panels

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Buying on credit or leasing

Calculator allows you to compare the costs incurred when buying a car on credit and taking it on lease.