5×7

5×7 is the multiplication expression denoting the product of five and seven. It is read “five times seven” and equals 35. The multiplication operation is commutative, so 5×7 equals 7×5.

In number theory, 5 and 7 are prime, and the prime factorization of the product 35 is 5×7. The divisors of 35 are 1, 5, 7, and 35. It is an odd composite number.

As a measure, 5×7 inches is a common size for photograph prints and greeting cards, and it is often referred to by its aspect ratio 5:7. The area of a 5×7 inch rectangle is 35 square inches (approximately 226 square centimeters).

In computing and design, 5×7 can denote a 5-by-7 grid or matrix, consisting of 35 elements.