The 8-screen calculator has 8 screens for subtotals so that you can visually check and calculate the memory calculation function. On each of the eight screens for subtotals, it is possible not only to perform normal calculations, but also to calculate subtotal results, and to use each subplanning surface to perform calculations in a brush-like manner. By using the sub-planning side, there are cases where you do not have to redo the calculation or take notes on paper. We hope that you will use the 8-screen calculator for work, study, and familiar calculations.