question: In dirhams , what was the yearly cost of the Iraqi postal service when Yusuf bin Umar was governor ?
answer: 4,000,000
turker_answer: The yearly cost of the Iraqi postal service when Yusuf bin Umar was governor was 4,000,000 dirhams .
rule-based: In dirhams , the yearly cost of the Iraqi postal service when Yusuf bin Umar was governor was 4,000,000 .