The equation "5 × 4 = 20" represents a basic multiplication problem. In this case, the number 5 is multiplied by 4, which means that 5 is added together 4 times. This is a fundamental concept in mathematics that helps in understanding how numbers can be combined. The result of this multiplication is 20. This means that if you have 5 groups of 4 items each, you will have a total of 20 items. Multiplication is a quick way to find the total number of items when dealing with equal groups.