So $2.4 \times 1.3 = 3.12$ ✅

More Examples

$0.6 \times 0.7$:

• $6 \times 7 = 42$
• 2 decimal places → $0.42$ ✅

$3.25 \times 4.1$:

• $325 \times 41 = 13,325$
• 3 decimal places → $13.325$ ✅

Multiplying by 10, 100, 1000

• Multiply by 10: move decimal right 1 place ($3.45 \times 10 = 34.5$)
• Multiply by 100: move decimal right 2 places ($3.45 \times 100 = 345$)
• Multiply by 1000: move decimal right 3 places ($3.45 \times 1000 = 3450$)

Estimation

$4.8 \times 3.2 \approx 5 \times 3 = 15$ Actual answer: $15.36$ ✓ (close!)

Quick check: If both factors are less than 1, the product is less than either factor: $0.3 \times 0.5 = 0.15$