How many international students attended Harvard University in 2012?
Harvard University refers to university_name = 'Harvard University'; international students refers to DIVIDE(MULTIPLY(num_students, pct_international_students), 100); in 2012 refers to year = 2012
SELECT CAST(T2.num_students * T2.pct_international_students AS REAL) / 100 FROM university AS T1 INNER JOIN university_year AS T2 ON T1.id = T2.university_id WHERE T1.university_name = 'Harvard University' AND T2.year = 2012