28×31

28×31 denotes the product of the integers 28 and 31. In arithmetic it represents the result of multiplying these two factors, and in geometric or practical contexts it can describe the area of a rectangle with sides of those lengths.

The calculation can be shown using the distributive property: 28×31 = 28×(30+1) = 840 + 28 = 868. This confirms the product value without performing full long multiplication.

From a factorization perspective, 28 = 2^2 × 7 and 31 is a prime number, so their product factors as 2^2 × 7 × 31, which equals 868. Consequently, the number 868 is even and composite.

In applications, 28×31 can represent dimensions or counts. For example, a rectangle measuring 28 by 31 units has an area of 868 square units. In grid or pixel contexts, a 28×31 arrangement contains 868 cells. If used as image dimensions, a 28-pixel by 31-pixel image comprises 868 total pixels.

Numerical representations include 868 in Roman numerals as DCCCLXVIII and in binary as 1101100100. The expression 28×31 is a straightforward example of a product in elementary arithmetic with a well-defined, easily computable result.