List the five decimals in ascending order, the average number is 42, the average number of the first three numbers is 27, and the average number of the last three numbers is 54, what is the middle number
把五个小数按小到大的顺序列，其平均数是42，且前三个数的平均数是27，后三个数的平均数是54，则中间一个数是多少
<gadget id="calculator">27 * 3</gadget>
<output>81</output>

<gadget id="calculator">54 * 3</gadget>
<output>162</output>

<gadget id="calculator">42 * 5</gadget>
<output>210</output>

<gadget id="calculator">162 - 210</gadget>
<output>-48</output>

<gadget id="calculator">81 + (-48)</gadget>
<output>33</output>

<result>33</result>