1. The problem is to calculate body mass index (BMI) using the formula. 2. The formula for BMI is $$\text{BMI} = \frac{\text{weight in kilograms}}{(\text{height in meters})^2}$$. 3. Important rules: - Weight must be in kilograms. - Height must be in meters. - Square the height before dividing. 4. Example: If weight = 70 kg and height = 1.75 m, then $$\text{BMI} = \frac{70}{(1.75)^2} = \frac{70}{3.0625}$$. 5. Simplify the fraction: $$\text{BMI} = \frac{70}{3.0625} \approx 22.86$$. 6. This means the BMI is approximately 22.86, which is within the normal weight range. This method can be used for any weight and height to find BMI.