... is it the author or the translator who has absolutely no idea whatsoever how volume works?
.68 * .3 * .46 meters is 0.09384 cubic meters, not 938.4 cubic meters.
When taking cubic meters, you can't take cubic centimeters and divide by 100, you have to take cubic centimeters and divide by 100^3, which is a MILLION.
Jesus christ. I don't know who the moron is here, but whoever they are, please go back to fucking elementary school. Yes, even if it's you, Fukumoto, you magnificent bastard.
Edit: For reference, 938 cubic meters is literally bigger than the average studio apartment in Japan. There are no suitcases the size of a motherfucking apartment.