Question 304083
Length = 72 3/4 = 291/4 
Width = 32 2/3 = 98/3 
Thickness = 1 3/8 = 11/8 
Volume = (291/4)*(98/3)*(11/8)
= 313698/96
= 52283/16
= 3267 11/16 cubic inches
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Mixed numbers are not very useful.