Rectangle — A field has length 100 m and breadth 40 m. Compute its area (in square meters).

Introduction / Context:
Convert the product of length and breadth directly into square meters to avoid ambiguous symbolic notations. This removes confusion from misprinted expressions like 4 × 10^x.

Given Data / Assumptions:

• L = 100 m
• B = 40 m

Concept / Approach:
Area of a rectangle A = L * B.

Step-by-Step Solution:
A = 100 * 40 = 4,000 sq m

Verification / Alternative check:
Magnitude check: 100 by 40 clearly covers 4,000 unit squares of 1 m by 1 m.

Why Other Options Are Wrong:
1,000, 1,400, 3,600, 4,400 sq m are arithmetic distractors and do not equal L * B.

Common Pitfalls:
Misreading symbolic options; using clear numerals prevents misinterpretation.

Final Answer:
4,000 sq m