<image> As shown in the figure, point \( A \) is on the graph of the inverse proportional function \( y = \frac{6}{x} \). Draw \( AB \) perpendicular to the \( x \)-axis through point \( A \), with foot \( B \). Line segment \( AB \) intersects the graph of the inverse proportional function \( y = \frac{2}{x} \) at point \( C \). Then, the area of \( \triangle OAC \) is ______.