そろばん ゲーム 電卓 ことわざ (ソロバーンvsデンターク)

The battle for the computing power of the abacus and the calculator is about to begin! (Battle of abacus and calculator)

Learn abacus while playing games! It is a game to defeat the enemy by calculation. The story progresses when you defeat the enemy. There are "training mode" and "easy mode", so even people who have never used an abacus or calculator can start. Bilingual support.