There are 36 students in the fourth-grade art group of Guangming Primary School. The number of students in the calligraphy group is 4 less than that of the art group. The number of students in the chorus group is twice that of the total number of art and calligraphy groups. How many people are there in the chorus?
光明小学四年级美术组有36人，书法组的人数比美术组少4人，合唱组的人数是美术组和书法组总人数的2倍．合唱组有多少人？
<gadget id="calculator">36 - 4</gadget>
<output>32</output>

<gadget id="calculator">36 + 32</gadget>
<output>68</output>

<gadget id="calculator">68 * 2</gadget>
<output>136</output>

<result>136</result>