$3 + \frac{1}{1 + \frac{1}{2 + \frac{1}{4}}} = $

$\frac{3}{2 \times 3} + \frac{3}{3 \times 4} + \dots + \frac{3}{10 \times 11} = $

$\frac{2}{7} + \frac{2}{24} + \frac{2}{48} + \frac{2}{7} = $