How to cook a rice cake?

Question:

i bought a package of rice cakes at a japanese grocery store because i thought they would be fun to try. but when i opened the package they are individually wrapped, small, and hard as a rock. of course, all the directions are in japanese. on the back thre are three pictures. one is two rice cakes in a bowl in the microwave, the second is two rice cakes in what looks like a toaster oven maybe? and the third is two of them in a pot on the stove. do i do all of these or just one? how do i make them and what can i do to make them taste good? thank you!

Answer:

If they are frozen (or not?) well all the pictures have to do with heat, so i'm guessing you'd have to heat them for a period of time. If you look for a number, you can probably know the heating time. Also i think they are like different options of how to cook them. Hope they're yummy!