There are 48 students in class 3 and 2, among which those who participated in the art interest group accounted for (2/3) of the whole class, and those who participated in the calligraphy interest group accounted for (3/4) of the whole class. What is the minimum number of people in both groups?
三2班有48名同学，其中参加美术兴趣小组的占了全班人数的(2/3)，参加书法兴趣小组的占了全班人数的(3/4)．两个小组都参加的最少有多少人？
<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">32 + 36</gadget>
<output>68</output>

<gadget id="calculator">68 - 48</gadget>
<output>20</output>

<result>20</result>