There are 4 numbers, take 3 of them each time, calculate their average, and add another number. This calculation is done 4 times, and the numbers are 27, 29, 33, and 37 respectively. What is the sum of the original 4 numbers?
有4个数，每次取出其中3个数，算出它们的平均数，再加上另一个数．这样计算了4次，得数分别是27、29、33、37．原来的4个数之和是多少．
<gadget id="calculator">27 + 29 + 33 + 37</gadget>
<output>126</output>

<gadget id="calculator">126 / 2</gadget>
<output>63</output>

<result>63</result>