How to print the following pattern

I would like to know how would one print this pattern out. Preferrably in C++ This program takes in only the number of rows as input and then prints the output as shown in the Example.

Input : 3
Output :
 1*2*3
 7*8*9
 4*5*6

Input : 4
Output :
 1*2*3*4
 9*10*11*12
 13*14*15*16
 5*6*7*8