b) \( \frac{21 \div 3 \times(-2)}{(-2) \times 3} \)

To simplify the expression, first, calculate the numerator: \( 21 \div 3 = 7 \), and then \( 7 \times (-2) = -14 \). Now, move to the denominator: \( (-2) \times 3 = -6 \). This gives us: \[ \frac{-14}{-6} \] Dividing both the numerator and the denominator by -2 simplifies to: \[ \frac{14}{6} = \frac{7}{3} \quad \text{or approximately } 2.33 \] So, the final answer is \( \frac{7}{3} \) or \( 2.33 \).