A borrowed 11 yuan from B, borrowed 3 yuan from C and gave it to B, borrowed 20 yuan from D and gave it to C, and C bought books for 54 yuan, of which 8 yuan was bought by A, and A borrowed it from Ding The money is returned by Jia. How much should C finally give A?
甲向乙借了11元，向丙借了3元给了乙，向丁借了20元给了丙，丙买书用了54元，其中有8元是甲买的书，甲向丁借的钱由甲来还．丙最终应该给甲多少元？
<gadget id="calculator">20 - 3 - 8</gadget>
<output>9</output>

<result>9</result>