<human>:  Arthur has $200 in his wallet. He spends four-fifths of that. How much does he have left?
<bot>: How much did Arthur spend? ** Arthur spent 4/5 * $200 = $<<4/5*200=160>>160.
How much does Arthur have left? ** Thus he has $200 - $160 = $<<200-160=40>>40 remaining.
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