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Hi there ,
hopefully I am writting in the right place to get my answer , actually I wanted to start a project which is Unint converter + GPA calculator , so I strated doing that , and I have designed the initial screens , but what I wanted is How to add command to the button to perform an opreation between 3 text field addion , mul, divsion... and show the result in the third text field .
I attached a picture which will make my idea more clear to you he design in the attachments ,
I appreciate any little help from you .