<'
extend sys {
 run() is also {
   out("10    = ",+10);
   out("-10   = ",-10);
   out("10+10 = ", 10 +10);
   out("10-1  = ", 10 -1);
   out("10*2  = ", 10 *2);
   out("10/2  = ", 10 /2);
   out("10%3  = ", 10 %3);
 };
};
'>