The expression "48x11" represents a multiplication problem where the number 48 is multiplied by 11. This operation is a basic arithmetic calculation that results in the total quantity of items when 48 groups of 11 items each are combined. When calculated, 48 multiplied by 11 equals 528. This means that if you have 48 sets of 11, you would have a total of 528 items. Multiplication is one of the four fundamental operations in mathematics, alongside addition, subtraction, and division.