For the four numbers A, B, C, and D, one number is removed each time, and the other three numbers are averaged. After doing this four times, the following four numbers are obtained: 45, 60, 65, 70, ask these four What is the average of the numbers?
甲，乙，丙，丁四个数，每次去掉一个数，将其余三个数求平均数，这样算了四次，得到以下四个数：45，60，65，70，问这四个数的平均数是多少？
<gadget id="calculator">45 * 3</gadget>
<output>135</output>

<gadget id="calculator">60 * 3</gadget>
<output>180</output>

<gadget id="calculator">65 * 3</gadget>
<output>195</output>

<gadget id="calculator">70 * 3</gadget>
<output>210</output>

<gadget id="calculator">135 + 180 + 195 + 210</gadget>
<output>720</output>

<gadget id="calculator">720 / 3 / 4</gadget>
<output>60</output>

<result>60</result>