This is Professor Scratch, the Human Calculator. He will answer your addition, subtraction, multiplication, division and squaring problems. ----------------------------------------------------------------- 這是有「人類計算機」之稱 Scratch 教授。他會解答你的加、減、乘、除和平方問題。 -----------------------------------------------------------------
Prof. Scatch is based on various real-life historical figures who are very good at mentally calculating complicated questions, such as Zerah Colburn, Carl F. Gauss and Thomas Fuller. Background design is inspired from my school's teacher's room. ----------------------------------------------------------------- 主角Scratch教授靈感源自歷史上特別擅長心算的數學家，比如謝拉·科爾伯恩、卡爾·高斯和托馬斯·富勒。 背景設計靈感源自我校的教師室。 -----------------------------------------------------------------
