A hotel often does not issue invoices to customers in order to avoid paying taxes. After inspection by the industrial and commercial department, the hotel underpaid 15,000 yuan in business tax. If the business tax is paid at 5% of the turnover, how much of the hotel’s turnover has not been taxed?
一家旅店为逃避纳税，经常不给顾客开发票，经工商部门检查，这家旅店少缴纳营业税1.5万元，如果按营业额的5%缴纳营业税，这家旅店有多少营业额没有纳税？
<gadget id="calculator">5 / 100</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">1.5 / (1/20)</gadget>
<output>30</output>

<result>30</result>