\u4eca\u5929\u5237\u5230\u4e00\u4e2a\u89c6\u9891\uff0c\u8bb2\u7684\u662finput\u8fd4\u56de\u4e00\u4e2a\u5b57\u7b26\u4e32\u3002\u5982\u679c\u60f3\u62ff\u5230\u6570\u5b57\u7684\u8bdd\uff0c\u9700\u8981\u7528int\u6216\u8005float\u7c7b\u578b\u8f6c\u6362\u3002\u8fd9\u4e2a\u7528\u6cd5\u633a\u5e38\u89c1\uff0c\u4e5f\u633a\u57fa\u7840\u7684\u3002<\/p>\n\n\n\n
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eval\u7b97\u662f\u4e00\u4e2a\u51fd\u6570\uff0c\u5b83\u7684\u529f\u80fd\u5c31\u662f\u63a5\u6536\u4e00\u4e2a\u5b57\u7b26\u4e32\u53c2\u6570\uff0c\u5c06\u5b57\u7b26\u4e32\u91cc\u7684\u5185\u5bb9\u6309\u7167Python\u7684\u4ee3\u7801\u8fdb\u884c\u6267\u884c\uff0c\u5e76\u5c06\u8fd4\u56de\u503c\u8d4b\u7ed9\u524d\u9762\u7684\u53d8\u91cf\u3002<\/p>\n\n\n\n
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a = eval(input())<\/p>\n\n\n\n
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