There are 40 students in the art group of a certain school, the number of art group is (2/3) the number of music group, and the number of math group is (3/4) the number of music group. How many people are there in the math group?
某校美术组有40人，美术组人数是音乐组人数的(2/3)，数学组人数又是音乐组人数的(3/4)．数学组有多少人？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">40 / (2/3)</gadget>
<output>60</output>

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

<gadget id="calculator">60 * (3/4)</gadget>
<output>45</output>

<result>45</result>