There are 12 people in a school's chess team, and they will participate in two competitions. (3/4) participated in Chinese chess competitions, and (1/3) participated in international chess competitions. How many people participated in both games?
某校棋类代表队共有12人，他们将参加两项比赛．参加中国象棋比赛的占(3/4)，参加国际象棋比赛的占(1/3)，两种比赛都参加的有多少人？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">12 * (3/4)</gadget>
<output>9</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">12 * (1/3)</gadget>
<output>4</output>

<gadget id="calculator">4 - 12</gadget>
<output>-8</output>

<gadget id="calculator">9 + (-8)</gadget>
<output>1</output>

<result>1</result>