Uncle Wang's mobile phone charge standard is: 30 yuan for 220 minutes, and the excess is charged at 0.3 yuan per minute (less than 1 minute is calculated as 1 minute). Uncle Wang talked for 280 minutes in August. How much is the minimum phone bill he should pay?
王叔叔的手机话费收费标准是：30元包打220分钟，超过的按每分钟0.3元计费(不足1分钟按1分钟计算)．王叔叔8月份通话280分钟．他至少应付多少元话费？
<gadget id="calculator">280 - 220</gadget>
<output>60</output>

<gadget id="calculator">0.3 * 60</gadget>
<output>18</output>

<gadget id="calculator">30 + 18</gadget>
<output>48</output>

<result>48</result>