Introduction - If you have any usage issues, please Google them yourself
Enter any four integers (0-10), the operator only addition, subtraction, multiplication, and division, as well as brackets each number can only and must be used once. Required to determine whether the results of these expression 24. If there is, the output calculation expressions: If input 4,6,1,1 output 4* 6* 1* 1 = 24 (allowing parentheses).