dimension box is working properly but as calculator I've found some issue.

I'm trying a simple equation **3+2** but result is default equation which I've drawn.

dimension box is working properly but as calculator I've found some issue.

I'm trying a simple equation **3+2** but result is default equation which I've drawn.

I assume you're using the Smart Dimension tool to establish a dimension that isn't already driven by relations or other dimensions? If yes, then I'm pretty sure you should be able to enter the information directly without the equal sign. So if you enter 3 + 2 and then Enter, you should get a driven dimension of 5.

Been a long time since I used 2012, I think I remember that you had to have an equal sign there. Such as =3+2. I'm not really sure though.