You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
University_of_Notre_Dame

Context:
Since 2005, Notre Dame has been led by John I. Jenkins, C.S.C., the 17th president of the university. Jenkins took over the position from Malloy on July 1, 2005. In his inaugural address, Jenkins described his goals of making the university a leader in research that recognizes ethics and building the connection between faith and studies. During his tenure, Notre Dame has increased its endowment, enlarged its student body, and undergone many construction projects on campus, including Compton Family Ice Arena, a new architecture hall, additional residence halls, and the Campus Crossroads, a $400m enhancement and expansion of Notre Dame Stadium.

Question:
How much money was spent on enhancing Notre Dame Stadium under John Jenkins?

$400m