Six-year Class 1 students subscribed to "Youth Daily" accounted for 60% of the total number of students in the class, and those who subscribed to "Selected Compositions of Primary School Students" accounted for 70% of the total number of students in the class. There were 50 students in this class. how many people?
六年1班订阅《少年报》的学生占全班总人数的60%，订阅《小学生作文选》的占全班总人数的70%，该班共有学生50人，问两种都订的有多少人？
<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">50 * (3/10)</gadget>
<output>15</output>

<result>15</result>