certain mobile company launched the "Shenzhou Xingjiajia Card" service. The charging standard is: a monthly rental fee (including the caller ID fee of 6 yuan) 18 yuan, all incoming calls in the city are answered for free, all calls in the city are 0.3 yuan per minute, and outside the city Phone calls will be charged according to the original billing standards. Mr. Wang’s mobile phone bill in May is 45.5 yuan. It is known that calls in the city are equivalent to (5/6) of the phone bill outside the city. How much is the phone bill for Mr. Wang’s calls outside the city in May?
某是移动公司推出"神州行家园卡"业务，收费标准是：月租费(含来电显示费6元)18元，在市内免费接听所有来电，市内打出所有电话每分钟0.3元，市外打电话收费按原计费标准收取．王老师五月份的手机话费共45.5元，已知市内电话相当于市外电话费的(5/6)，王老师五月份在市外打出的电话费是多少元？
<gadget id="calculator">45.5 - 18</gadget>
<output>27.5</output>

<gadget id="calculator">6 + 5</gadget>
<output>11</output>

<gadget id="calculator">6 / 11</gadget>
<output>6/11 = around 0.545455</output>

<gadget id="calculator">27.5 * (6/11)</gadget>
<output>15</output>

<result>15</result>