我想去国外论坛查个治疗，但是有提示，英文看不懂，请达人帮我看下
What is the sum of 2, 5 and 4? Hint: Add them together. ?Cuál es la suma de 2, 5 y 4? Sugerencia: A?ada juntos.:
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他说2,5和4的总和是多少，难道是42.5？还是6.5，我全部都试过了，还是出错
[解决办法]
输入2+5+4的结果试试