The capacity of the tape recorder is about 20 cubic decimeters.

0.8*(0.8-0.2)*0.5=0.24

1.3*0.6*0.8*20= 12.48

6*4*(3.5-0.5)* 1=72

Length: 40-5*2=30

Width: 35-5*2=25

G: 5

Volume: 30*25*5=3750