At the beginning of each piece of music after the bass clef, is the time signature. The time signature indicates the number of beats per bar (the top number) and the type of note receiving one beat (the bottom number).
These two numbers are called the four four time signature.
They are placed after the bass clef.
The * time signature tells you there are four beats in each bar.
There are four quarter notes in one bar of music in * time.