Lele swept the classroom (3/7), Tongtong swept (5/12), Taotao finally finished the rest, how much of the classroom did Taotao sweep?
乐乐扫了教室的(3/7)，彤彤扫了(5/12)，涛涛最后把剩下的扫完了，涛涛扫了教室的几分之几？
<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">5 / 12</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">1 - (3/7) - (5/12)</gadget>
<output>13/84 = around 0.154762</output>

<result>13/84 = around 0.154762</result>