Question

I have just started C programming after a semester of Java. I am very new to this and the teacher has not really given much instruction so I am completely lost on what to do for this. I need to determine the decimal value f the following constants: 034, 0xA, 0xBA, and 12.3xE+3 and write a simple program to verify my calculations.

I am using emacs as my IDE and gcc as my compiler I think? I am so lost please help