81×30

81×30 denotes the product of the integers 81 and 30. The result is 2430, since 81×30 = 81×3×10 = 243×10 = 2430, or by splitting as (80+1)×30 = 2400+30 = 2430.

Prime factorization: 81 = 3^4 and 30 = 2×3×5, so 81×30 = 2×3^5×5 = 2430.

In other representations, 2430 is decimal; in hexadecimal it is 0x97E; in binary it is 1001011111110_2; in Roman numerals it is MMCDXXX.

Numerical properties: The product is even and ends in 0, so divisible by 10. Its digit sum is 9, making it divisible by 9 as well. The calculation is a common example in arithmetic and can arise in contexts such as area computations, unit conversions, and scaling problems where simple factors like 30 are used to adjust a base quantity.