The school bought 8 thermos bottles, paid 200 yuan, and got back 64 yuan. How much is each thermos bottle?
学校买来8只热水瓶，付了200元，找回64元，每只热水瓶多少元？
<gadget id="calculator">200 - 64</gadget>
<output>136</output>

<gadget id="calculator">136 / 8</gadget>
<output>17</output>

<result>17</result>