6x54= 324
6x50=300
6x4=24
300+24=324
The previous nearest cube root is 216 and the next cube root would be 343.
p/q could be any prime number which there are a lot of.
im going to say p is 1 and q is 3
next you would divide 1 by 3
1/3=0.666666667
324x0.666666667=216 exact