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 operations equivalent to 24. Only the operator can use :+,-,*,/, can also use () to change the order of operations.