arithmetic, 130 bytes

Result

AC

Duration

952ms

Code [DL]

1=1
1=1+0
2=2
75=75
9-0=9
10=10
51-0=51
84=168/2
75=84-9
51/50=3/2
51=51
84=84
84=42*2
75/84=0/3
0=10-10
3=3
51-0=51
0=0*0
48=51-3

stdin

                                               T  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
                                                  
   K                                              

stdout

                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
                                               T  
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                                               T  
                                               T  
   K11111111111111111111111111111111111111111111

stderr

strace

10    execve("/bin/sh", ["/bin/sh", "/root/script", "/volume/CODE"], 0x7ffe0c856450 /* 9 vars */) = 0
11    execve("/bin/cat", ["cat", "-"], 0x556870a1a068 /* 9 vars */ <unfinished ...>
12    execve("/usr/local/ruby-2.6.3/bin/ruby", ["/usr/local/ruby-2.6.3/bin/ruby", "/root/Arithmetic/eso.rb", "/volume/CODE"], 0x556870a1a090 /* 9 vars */ <unfinished ...>
11    <... execve resumed> )            = 0
12    <... execve resumed> )            = 0
11    +++ exited with 0 +++
10    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=11, si_uid=0, si_status=0, si_utime=0, si_stime=0} ---
12    +++ exited with 0 +++
10    --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=12, si_uid=0, si_status=0, si_utime=10, si_stime=2} ---
10    +++ exited with 0 +++