个1~9之间的自然数作为操作数，而您的任务是对这4个操作数进行适当的算术运算，要求运算结果等于24。可以使用的运算只有：+，-，*，/，还可以使用（）来改变运算顺序。-1 to 9 months between the natural numbers as operands, and your task is to operate the four the number of arithmetic operations appropriate to require the results of