The four numbers A, B, C, and D, remove one number each time, and average the remaining three numbers. After doing this calculation 4 times, the following 4 numbers are obtained: 42, 58, 67, 73, ask the original four What is the average of the numbers?
A，B，C，D四个数，每次去掉一个数，将其余3个数求平均数，这样算了4次，得到以下4个数：42，58，67，73，问原四个数的平均数是多少？
<gadget id="calculator">42 + 58 + 67 + 73</gadget>
<output>240</output>

<gadget id="calculator">3 / 3 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">240 * (1/4)</gadget>
<output>60</output>

<result>60</result>