There are 50 students in a class. When investigating whether they have electronic keyboards and computers in their homes, it is found that there are 14 students who do not have both, and 16 students who have electronic pianos. The ratio of the number of students who only have computers to those who have both is 5 : 2, what is the number of people who only have electronic pianos?
某班有学生50人，在调查他们家中是否有电子琴和电脑时发现，两种都没有的学生有14人，有电子琴的共有16人，只有电脑的与两种都有的人数之比为5：2，则只有电子琴的人数是多少．
<gadget id="calculator">50 - 14 - 16</gadget>
<output>20</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">20 * (2/5)</gadget>
<output>8</output>

<gadget id="calculator">16 - 8</gadget>
<output>8</output>

<result>8</result>