please solve this question and write code in java

In mathematics, specifically set theory, the Cartesian product (or cross-product) of two sets A and B, denoted A ~ B, is the set of all ordered pairs (a, b) where a is in A and bis in B. For example, if set A was a set of integers [2,3] and set B was the set of integers [6,7,8] then the Cartesian product AxB would be: 2 x 6 = 12 2 x 7 = 14 2 x 8 = 16 3 x 6 = 18 3 x 7 = 21 3 x 8 = 24 This can easily be done in a nested for loop: for(int i=0; i