3×42

3×42 is a simple arithmetic expression that denotes the product of the integers 3 and 42. In standard decimal arithmetic, the result is 126.

The prime factorization of 126 is 2 × 3^2 × 7, since 42 itself factors as 2 × 3 × 7 and multiplying by 3 adds another factor of 3. Consequently, 126 is a composite number with twelve positive divisors: 1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, and 126. It is even and divisible by 3, 7, and 9, among others, by standard divisibility rules.

In other numeral systems, 126 has different representations: in binary it is 1111110, in octal it is 176, in hexadecimal it is 7E, and in Roman numerals it is CXXVI. These representations illustrate how the same value is depicted across numeral systems.

Context and usage: as a product, 3×42 commonly appears in basic arithmetic education and in counting problems that involve grouping 42 items into threes, or forming three groups of 42 items. It also serves as a straightforward example for illustrating properties of even, composite numbers and factorization.