The extracurricular activities of the fifth grade of Guangming Primary School include sports, music, and calligraphy. The number of participants is 54, 46, and 36 respectively. There are 4 people who participated in the sports group and the music group at the same time, 7 people who participated in the sports group and the calligraphy group at the same time, 10 people who participated in the music group and the calligraphy group at the same time, and 2 people who participated in all three groups. How many people in the fifth grade of Guangming Primary School participated in extracurricular activities?
光明小学五年级课外活动有体育、音乐、书法三个小组，参加的人数分别是54人、46人、36人．同时参加体育小组和音乐小组的有4人，同时参加体育小组和书法小组的有7人，同时参加音乐小组和书法小组的有10人，三组都参加的有2人．光明小学五年级参加课外活动的一共有多少人？
<gadget id="calculator">54 + 46 + 36</gadget>
<output>136</output>

<gadget id="calculator">4 + 7 + 10</gadget>
<output>21</output>

<gadget id="calculator">136 - 21</gadget>
<output>115</output>

<gadget id="calculator">115 + 2</gadget>
<output>117</output>

<result>117</result>