To click in the Calculator, use the left mouse key. You can select the numbers, select the calculation method, and scroll the tape at the top of the calculator. Use these functions:
Clear All - To clear the display and the ongoing calculation, click the C button.
Result - To see the result of the calculation, click =.
Accept the result - To close the calculator and enter the result in the form's field, click OK.
Close without saving - To close the calculator and leave the form's field unchanged, click Cancel.