Place your right hand on the numeric keypad like this:
Index finger on 4
Middle finger on 5
Ring finger on 6
Thumb on 0
Little finger on Enter
From these home keys:
Index finger reaches numbers 7 and 1
Middle finger reaches numbers 8 and 2, and the division (/) key
Ring finger reaches numbers 9 and 3, the multiplication (*) key and the decimal point. We also recommend to use it for the subtraction (-) key as this is easier than using your little finger.
Little finger reaches the addition (+) key