In a chorus team, Xiaoming’s position from the front is (9, 7), and the position from the back is (3, 5). Please count how many people there are in this chorus team.
在一个合唱队中在前面看小明的位置是(9，7)，在后面看的位置看是(3，5)，请你算一算这个合唱队共有多少人．
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">9 + 2</gadget>
<output>11</output>

<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">7 + 4</gadget>
<output>11</output>

<gadget id="calculator">11 * 11</gadget>
<output>121</output>

<result>121</result>