A cubic foot contains 12 x 12 x 12 cubic inches which equals 1728 in3. If we multiply 22 x 14 x 9 we get 2772 in3. 2772/1728 = about 1.6 so this suitcase has slightly more than one and a half cubic feet of volume.
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60 cubic feet
1.2 (cubic feet) = 2073.6 cubic inches
54,600 cubic inches = 31.6 cubic feet
16 cubic feet = 27,648 cubic inches
one cubic meter is 35.3 cubic feet