1. **State the problem:** We need to evaluate the expression "no half 14 divide divide 91". Interpreting this as $\frac{14}{\frac{1}{2}} \div 91$.\n\n2. **Rewrite the expression:** \n\n$$\frac{14}{\frac{1}{2}} \div 91$$\n\n3. **Recall the rule:** Dividing by a fraction is the same as multiplying by its reciprocal. So, $\frac{14}{\frac{1}{2}} = 14 \times 2 = 28$.\n\n4. **Now the expression becomes:** \n\n$$28 \div 91$$\n\n5. **Divide 28 by 91:** \n\n$$\frac{28}{91}$$\n\n6. **Simplify the fraction:** Both numerator and denominator are divisible by 7.\n\n$$\frac{\cancel{7}4}{\cancel{7}13} = \frac{4}{13}$$\n\n7. **Final answer:** \n\n$$\frac{4}{13}$$\n\nThis means the value of the expression is $\frac{4}{13}$.