I'm not sure if our math teacher was drunk or not but he gave us 1-13 on page 29 and number 13 is the following:

13. a. Fill in the blanks to complete this BASIC program which computes area and perimeter of regtanckes

10 Print "AREA AND PERIMETER OF A REGTANGLE"
20 INPUT "LENGHT"; L
30 INPUT "WIDTH"; W
40 LET A = ___?____
50 LET B = ___?____
60 PRINT "AREA", "PERIMETER"
70 PRINT A, P
80 END

now how the hell do I solve this? so I enter any numbers? becuase I'm not sure what the hell he wants from me

(this is honors math for 8th grade, not programming)