The screen lets you do arithmetic on two hex or decimal numbers.
Input value: Input your numbers in hex or decimal format. For hex number, use 0x before the number.
Hex value: This is the calculated value presented in hexadecimal format.
Dec value: This is the calculated value presented in decimal format.
Example of valid input:
0x20 + 0x30
3511 + 0x55
1025 + 800
*End of help document*