Shouldn't it be "you can do that easily"?

Native speaker’s answer
Rebecca
Good point! Here, "easily" would be correct. However, "easy" can be used within informal and casual conversations like this. Here it has the same meaning as doing something without difficulty. When used like this, it's often said as one word in relation to other sentences or contexts. It has a similar tone as saying something requires no effort; as if a child could do it, that's how easy it is. Ex: You can climb that tree easily, Peppa. Ex: She'll win the competition. Easy. Ex: Person A - I bet you can't climb that tree Person B - I can climb it. Easy.