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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.
Long description
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Calendar
Date calculator
Calculator allows you to calculate the date, which will be after a specified number of days, months and years from a certain date.
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Calendar
Calculator seniority in Poland
Calculator to calculate the total length of service after the date of employment or dismissal.
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Verifiers
Verification ISBN preview
Jak sprawdzić numer ISBN?
Jak zweryfikować numer ISBN?
Jak zweryfikować numer ISBN?
Calculator allows you to verify the ISBN number entered.
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Life
Human demand for water
The calculator calculates the interest of your body's daily requirement of water.
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Rainwater tank
The calculator calculates the amount of collected rainwater from the roof of the given dimensions.
Long description
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Savings
Buying on credit or leasing
Calculator allows you to compare the costs incurred when buying a car on credit and taking it on lease.
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Verifiers
Verification of the REGON number in Poland
Verifier allows you to validate entered REGON number