奇怪的小于号"<"

fl202

命令: (atof (rtos (* 1.05 b) 2 3))
0.84
命令: (equal a (atof (rtos (* 1.05 b) 2 3)))
T
命令: (< a (atof (rtos (* 1.05 b) 2 3)))
nil
命令: (equal a (* 1.05 b))
nil
命令: (< (atof (rtos a 2 10)) (atof (rtos (* 1.05 b) 2 10)))
nil