There are 840 students in the second grade of the Experimental Middle School, and one computer is prepared for every 8 students. 92 units have been prepared. How many more students do I need to prepare computers for?
实验中学高二年级有840名学生，按照每8人准备一台电脑．已经准备好了92台．还需要为多少学生准备电脑？
<gadget id="calculator">8 * 92</gadget>
<output>736</output>

<gadget id="calculator">840 - 736</gadget>
<output>104</output>

<result>104</result>