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calculator pen / Calculator

calculator pen
calculator pen

When we are keeping accounts, we usually use a pen and calculator simultaneously. However, inputting the wrong number can cause errors, forcing us to start our calculations all over. Pen-Calculator combines the idea of a calculator and pen. As you write your calculations on paper, it keeps track of the numbers and operators such as addition, subtraction, multiplication, and division. After you write an equal sign, it then shows you the answer on the screen.


National Cheng Kung University

National Cheng Kung University
TAINAN, Taiwan


National Cheng Kung University

National Cheng Kung University
Kaohsiung, Taiwan

Chen,Xin-An Shih,Chun-Yu