CRITICAL for ALL mathematical and numerical operations including arithmetic, percentages, averages, and DATE/CALENDAR calculations (day of week, date differences, time calculations). MANDATORY when user asks to calculate, compute, solve expressions, determine dates, or perform any numeric analysis.
User: "What's 15% of 250?" Action: Calculate: 250 × 0.15 = 37.5 Response: "15% of 250 is 37.5"
User: "Calculate (45 + 27) × 3 - 12 / 4" Action:
User: "If I buy 3 items at $24.99 each and 2 items at $12.50 each, what's the total?" Action: