If someone said, "That trip is 20 hours of driving, but we could get there 5 times faster if we fly," then what would you think they mean? I would think 4 hours

If someone said, "That trip is 20 hours of driving, but we could get there 5 times faster if we fly," then what would you think they mean? I would think 4 hours. Yes, the language "five times cheaper" is imprecise, but common sense says they probably mean the simple interpretation. In fact, because they aren't speaking precisely, it isn't reasonable to apply some kind of super technical methodology to interpret what they're saying.