题目

The days of staring at the computer screen pretending to take an interest in an assignment even though you are bored out of your mind may soon be coming to an end. That's because computers of the future will be able to detect boredom and even react to it in real time. But before you get concerned, the machine is not reading your mind. It is just keeping track of the constant involuntary movements that people exhibit when in front of a computer or even a television. These are not the bigger instrumental actions like moving a mouse or using the remote, but sensitive hardly noticeable move简便计算：471471471÷157157157．