The school chorus group has 90 students, the art group has 2/3 of the chorus group, and the calligraphy group has 4/5 of the art group. How many people are there in the calligraphy group?
学校合唱小组有学生90人，美术小组的人数是合唱小组的(2/3)，书法小组的人数是美术小组的(4/5)．书法小组有多少人？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">90 * (2/3) * (4/5)</gadget>
<output>48</output>

<result>48</result>