Arrange five consecutive natural numbers in descending order. It is known that the sum of these five consecutive natural numbers (1/3) is more than the third number 18. Among these five consecutive natural numbers, what is the average of the three larger numbers?
把五个连续的自然数按从大到小的顺序排列，已知这五个连续自然数的和的(1/3)比第三个数还多18．在这五个连续自然数中，三个较大数的平均数是多少．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">18 / (2/3)</gadget>
<output>27</output>

<gadget id="calculator">27 + 27 + 1 + 27 + 2</gadget>
<output>84</output>

<gadget id="calculator">84 / 3</gadget>
<output>28</output>

<result>28</result>