Bank of China provides the following information: 1 Hong Kong dollar is exchanged for 1.07 yuan; 1 US dollar is exchanged for 8.3 yuan; 1 US dollar is exchanged for 7.7 Hong Kong dollars; 100 yen is exchanged for 7 yuan. Xiao Min's father bought Xiao Min a storybook in the United States and paid $2.59, which is equivalent to RMB.
中国银行提供如下信息：1元港币换人民币1.07元；1美元换人民币8.3元；1美元换港币7.7元；100日元换人民币7元．小敏爸爸在美国给小敏买一本故事书付了2.59美元，折合人民币多少元．
<gadget id="calculator">2.59 * 8.3</gadget>
<output>21.497</output>

<result>21.497</result>