Compute: 3897 × 999.

Given data

• Multiply 3897 by 999.

Concept / Approach

• Use 999 = 1000 − 1 to avoid long multiplication.

Step-by-step calculation

3897 × 999 = 3897 × (1000 − 1)= 3897 × 1000 − 3897= 3,897,000 − 3,897 = 3,893,103

Verification

(3,893,103 + 3,897) = 3,897,000 = 3897 × 1000 \u2192 correct.

Common pitfalls

• Arithmetic slip in subtraction; align place values carefully.

Final Answer

3893103