How many female students are there in University of Pennsylvania in 2011?
in 2011 refers to year 2011; female students refers to DIVIDE(MULTIPLY(num_students, pct_female_students), 100); University of Pennsylvania refers to a university name;
SELECT CAST(T1.num_students * T1.pct_female_students AS REAL) / 100 FROM university_year AS T1 INNER JOIN university AS T2 ON T1.university_id = T2.id WHERE T1.year = 2011 AND T2.university_name = 'University of Pennsylvania'