| Calculator ~0.00
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| Left field is computing data. Right panel input buttons and controls. To enter evaluates arithmetic expressions: from keyboard, click the field calculation, enter the numbers and operations on them, from buttons, clicking a button on the calculator, type a number and action on them. For the results, click "=". For storing the results, click one of the "s". To enter the result in the field of computing click the desired "e". To erase the computing field click "x".