How to make calculator or more likely how to make calculations

I found some topics on how to make calculator in gdevelop but none of them answered my questions

Where i would wish to create calculator
But my only problem is how to pass operator or is it called modification sign like + - / *
I am thinking i would need to create array and each segment of numbers would be numbers until modification sign is added like + or -

But i have no idea how to make that into dynamic equation i could just type in real time ingame
Instead of making premade equation in events

I did try this

But it ends up with 5
And i can’t type + in number var since it expects number value
Where converting “+” in text var ToNumber() does not give anything