As practical as the reasons to lob a few zeros off the rupiah are, the timing is not ideal, says political analyst Hasan Jafri. SINGAPORE: Anyone travelling to Indonesia has to be skilled in arithmetic gymnastics when exchanging foreign currency into the local rupiah. The temporary euphoria created by the illusion of becoming an instant millionaire is soon replaced by the agony of carrying wads of cash and confusion about the real cost of goods and services. In other words: a headache.