The sums obtained by adding every three of the four one-digit numbers are 9.6, 9.1, 8.8, and 8.5 respectively. So what is the largest number among the original four numbers?
四个一位小数中每三个相加得到的和分别是9.6、9.1、8.8、8.5．那么原来四个数中最大的一个数是多少？
<gadget id="calculator">9.6 + 9.1 + 8.8 + 8.5</gadget>
<output>36</output>

<gadget id="calculator">36 / 3</gadget>
<output>12</output>

<gadget id="calculator">12 - 8.5</gadget>
<output>3.5</output>

<result>3.5</result>