You ought not to compile anything in the "bin" directory. You ought to create your own directory to put your work in.
It is best not to set a system classpath at all, in which case the JVM will take "." (ie current directory) as a default for the classpath. What it means is, if you download some Java files (most commonly in .jar format) which you need for your application, you add the address of those files to your classpath, then the compiler and "java" tool can find those files.
If you want to compile in a particular directory, try this sort of thing, immediately after opening your command prompt window
mkdir java
cd java
mkdir food
cd food
javac -d . BeefSteak,java
That will create the directories, then you need to save the .java files in the food directory after writing "mkdir food" and before writing "javac . . ." Note that using the -d option will create subdirectories corresponding to the package names in your .java files. If the BeefSteak class has a dependency in another file, that file must be compiled first. Or try
or similar, or
I don't know whether you have to name the classes in any particular order when compiling.
You don't need to do anything with the classpath for that sort of compiling.