Citizen CT-300 J Basic (10 Digit) Price: Rs. 313 To help you with all your mathematical calculations, Citizen has designed this CT-300 J Basic calculator. This marvelous calculator is a basic calculator which you can use to perform basic functions such as addition, subtraction, multiplication and division. Designed with a 10 digit display and also with a single display line, you can view all the numbers clearly. This CT-300 J Basic calculator is powered by a battery and also by solar. The dimensions of the CT-300 J Basic calculator by Citizen are 72 x 120 x 9 mm and it weighs a mere 50 g, making it a lightweight and portable calculator.