You can mental math with Unity-chan in a simple operation. Let's train computational power. Easy operation just to select the calculation result with 4 choices. You compete for speed in 20 matches per game. Unity-chan tries to explore the meadow, the desert, the snow country and the castle. If you make a mistake in calculations you will lose 2 seconds of time. The key to ranking is how to solve quickly without mistaking. Lastly you will battle Toko! You fight with only 4 choices. Even if yo