A student participates in target shooting training and shoots 10 times. He scored 9.0 rings, 8.4 rings, 8.1 rings, and 9.3 rings in the 6th, 7th, 8th, and 9th shots respectively. The average number of rings he got in the first 9 shots was higher than the previous 5 shots. The resulting average number of rings, if the average number of rings for 10 shots exceeds 8.8 rings, then. How many rings does he have at least in the 10th shot. (The number of rings obtained by each shooting is accurate to 0.1 ring).
某学生参加打靶训练，射击10次．他在第6次、第7次、第8欠、第9次射击中分别得了9.0环、8.4环、8.1环、9.3环，他的前9次射击所得的平均环数高于前5次射击所得的平均环数，如果要使10次射击的平均环数超过8.8环，那么．他在第10次射击中至少要得多少环．(每次射击所得环数都精确到0.1环)．
<gadget id="calculator">8.8 * 10</gadget>
<output>88</output>

<gadget id="calculator">9 + 8.4 + 8.1 + 9.3</gadget>
<output>34.8</output>

<gadget id="calculator">34.8 / 4</gadget>
<output>8.7</output>

<gadget id="calculator">8.7 - 0.1</gadget>
<output>8.6</output>

<gadget id="calculator">8.6 * 9</gadget>
<output>77.4</output>

<gadget id="calculator">88 - 77.4</gadget>
<output>10.6</output>

<gadget id="calculator">10.6 + 0.1</gadget>
<output>10.7</output>

<result>10.7</result>