There are 48 students in Class 1 of the sixth grade, among them (2/3) like to dance, (3/4) like to sing, no one likes neither dancing nor singing. How many people like to both dance and sing?
六年级一班有48人，其中(2/3)喜欢跳舞，(3/4)喜欢唱歌，没有人既不喜欢跳舞又不喜欢唱歌．既喜欢跳舞又喜欢唱歌的有多少人？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">48 * (2/3)</gadget>
<output>32</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">48 * (3/4)</gadget>
<output>36</output>

<gadget id="calculator">36 - 48</gadget>
<output>-12</output>

<gadget id="calculator">32 + (-12)</gadget>
<output>20</output>

<result>20</result>