The sum of the two numbers of A and B is 218. If the number C is added, the average of the three numbers is 5 more than the average of the two numbers of A and B. What is the number of C?
甲乙两个数的和是218，如果再加上丙数，这时三个数的平均数比甲乙两数的平均数多5，丙数是多少
<gadget id="calculator">218 / 2</gadget>
<output>109</output>

<gadget id="calculator">109 + 5</gadget>
<output>114</output>

<gadget id="calculator">114 * 3</gadget>
<output>342</output>

<gadget id="calculator">342 - 218</gadget>
<output>124</output>

<result>124</result>