Threads: Read and write program 2 integer and print out the result of the community (+), Subtraction (-), multiplication (*), division (/). The result of dividing rounded to 2 decimal. Input: A line of 2 integers a, b (other b 0) separated by spaces. Output: 2 current, Recorder flow total, brand's 2 number, line after record trade volume of 2 number. The numbers on the same line separated by spaces.