In the manual class, the students cut out some triangles, quadrilaterals and pentagons. All the papers have a total of 394 sides, of which pentagons have 2 sides, and quadrilaterals have 82 more sides than triangles. Ask: How many quadrilaterals are there?
在手工课上，同学们剪出了一些三角形、四边形和五边形的纸片，所有纸片总共有394条边，其中五边形有2个，四边形比三角形多82个．请问：四边形有多少个？
<gadget id="calculator">3 * 82</gadget>
<output>246</output>

<gadget id="calculator">5 * 2</gadget>
<output>10</output>

<gadget id="calculator">394 - 10</gadget>
<output>384</output>

<gadget id="calculator">246 + 384</gadget>
<output>630</output>

<gadget id="calculator">4 + 3</gadget>
<output>7</output>

<gadget id="calculator">630 / 7</gadget>
<output>90</output>

<result>90</result>