Xiaodi's father paid 82 yuan for the telephone bill in January and 117 yuan in February. He wants to control the phone bill in the first quarter to an average of 90 yuan per month, so how much should the phone bill be at most in the last month of this quarter?
小迪的爸爸元月份交电话费82元，二月份交了117元．他想将第一季度的电话费控制在每月平均90元，那么本季度最后一个月计划用电话费最多应该是多少元？
<gadget id="calculator">90 * 3</gadget>
<output>270</output>

<gadget id="calculator">270 - 82 - 117</gadget>
<output>71</output>

<result>71</result>