The teacher bought the same amount of pencils, ballpoint pens and pens. If the teacher distributes 1 pencil, 2 ballpoint pens and 3 pens to each student in the math group. As a result, there are 42 ballpoint pens left, so how many pencils and pens are left?
老师买了同样数量的铅笔、圆珠笔和钢笔．如果老师发给数学小组每个同学1支铅笔，2支圆珠笔和3支钢笔．结果圆珠笔还剩42支，那么，铅笔和钢笔共剩了多少支．
<gadget id="calculator">42 * 2</gadget>
<output>84</output>

<result>84</result>