Let \( l \) be a line which is normal to the curve \( y=2 x^{2}+x+2 \) at a point \( P \) on the...

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Let \( l \) be a line which is normal to the curve \( y=2 x^{2}+x+2 \) at a point \( P \) on the curve. If the point \( Q(6,4) \) lies on the line \( l \) and \( O \) is origin, then the area of the triangle \( O P Q \) is equal to
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