It would depend upon the details of what is meant by learning calculus. Learning enough to pass the average high school class on it isn't much. Above average

It would depend upon the details of what is meant by learning calculus. Learning enough to pass the average high school class on it isn't much. Above average at math, but nothing very impressive. But the same language could also describe learning it at something closer to the level of analytics, having a much deeper understanding than the average class produces. The deeper the understanding, the more impressive the achievement, yet it would still be described in layman terms as "learning calculus".