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Conversion between number bases

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Calculator allows you to calculate the amount of insulation panels needed to cover the walls of the building using the "light wet" or "dry light" methods.
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ROCE - an indicator of the efficiency of investment

The calculator calculates ROCE on the basis of these pre-tax profits, total capital and current liabilities ROCE (called Return On Capital Employed) - an indicator of the efficiency and profitability of the investment, which is the capital of the company involved.            
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Pseudo-random number generator without repetition

Calculator generates random numbers without repetition from 0 to n-1.        
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The calculator calculates the amount of collected rainwater from the roof of the given dimensions. Long description