The charge for an international long-distance call in a certain city is 6 yuan within 3 minutes, and if it is less than 3 minutes, it will be calculated as 3 minutes. The unit price for every additional minute is 1.6 yuan. Grandma made 28 minutes of international calls. How much yuan should she pay?
某市电话国际长途费用是3分钟内6元钱，不够3分钟的按3分钟计算．每超出1分钟的单价是1.6元，奶奶共打了28分钟的国际长途，她应付多少元？
<gadget id="calculator">28 - 3</gadget>
<output>25</output>

<gadget id="calculator">1.6 * 25</gadget>
<output>40</output>

<gadget id="calculator">40 + 6</gadget>
<output>46</output>

<result>46</result>