The average turnover of a large hotel is about 30 yuan. If the business tax is paid at 5% of the turnover, how much should this store pay for its annual sales?
一家大饭店平均的业额约是30元．如按营额的5%缴纳营业税，这家店一年应纳营业约多万元？
<gadget id="calculator">5 / 100</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">30 * (1/20) * 12</gadget>
<output>18</output>

<result>18</result>