此計算機之算式為A+B-C，如果你只想進行減數，可以將B設為0度0分（於Sign下拉式清單選 Aries / Nil）；同樣地，如果你只想進行加數，則同樣地把C 設為0度0分。答案會出現在最下方Result一欄。
The formula of this calculator is A+B-C. If you only want to do deduction, just simply set B as 0 degree 0 minute (choose Aries / Nil in the Sign drop-down list). Similarly, if you only want to do addition, just simply set C as 0 deg 0 min. The result will be shown in the bottom-most Result column.