A restaurant pays business tax at 5% of its turnover. The restaurant paid a tax of 9,000 yuan last month. What was the turnover of this restaurant last month?
某饭店按营业额的5%缴纳营业税，这个饭店上个月缴税9000元，这个饭店上个月的营业额是多少元．
<gadget id="calculator">5 / 100</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">9_000 / (1/20)</gadget>
<output>180_000</output>

<result>180_000</result>