The average of the three numbers A, B, and C is 28, and the sum of the two numbers D and E is 64. What is the average of these five numbers?
甲、乙、丙三个数的平均数是28，丁、戊两个数的和是64，这五个数的平均数是多少．
<gadget id="calculator">28 * 3</gadget>
<output>84</output>

<gadget id="calculator">84 + 64</gadget>
<output>148</output>

<gadget id="calculator">148 / 5</gadget>
<output>148/5 = around 29.6</output>

<result>148/5 = around 29.6</result>