{"trustable":false,"prependHtml":"\u003cscript\u003e window.katexOptions \u003d { disable: true }; \u003c/script\u003e\n\u003cscript type\u003d\"text/x-mathjax-config\"\u003e\n MathJax.Hub.Config({\n tex2jax: {\n inlineMath: [[\u0027$$$\u0027,\u0027$$$\u0027], [\u0027$\u0027,\u0027$\u0027]],\n displayMath: [[\u0027$$$$$$\u0027,\u0027$$$$$$\u0027], [\u0027$$\u0027,\u0027$$\u0027]]\n }\n });\n\u003c/script\u003e\n\u003cscript async src\u003d\"https://mathjax.codeforces.org/MathJax.js?config\u003dTeX-AMS-MML_HTMLorMML\" type\u003d\"text/javascript\"\u003e\u003c/script\u003e","sections":[{"title":"","value":{"format":"MD","content":"计算多组仅包含四则运算的自然数计算表达式的值。"}},{"title":"Input","value":{"format":"MD","content":"多行输入,每行为一个字符串,长度不超过200,数字和运算符用一个空格分离,保证输入均合法。\n当一行中只有0时结束输入,该行无对应输出。"}},{"title":"Output","value":{"format":"MD","content":"多行输出,精确至小数点后两位。"}},{"title":"Sample Input","value":{"format":"MD","content":"\u003cpre\u003e2 + 2\n4 * 2 * 1 * 1 * 1 / 1 / 1 / 1 - 1 + 1 + 1 + 1 / 1 / 1 / 4 / 2 + 5\n0\u003c/pre\u003e"}},{"title":"Sample Output","value":{"format":"MD","content":"\u003cpre\u003e4.00\n14.12\n\u003c/pre\u003e"}}]}