Mr. Ye went to the bookstore and bought 16 copies of "The Story of the Scientist" for 6 yuan each. He gave the salesperson 100 yuan. How much should he get back?
叶老师到书店买了16本《科学家的故事》，每本6元，他给售货员100元，应找回多少元？
<gadget id="calculator">16 * 6</gadget>
<output>96</output>

<gadget id="calculator">100 - 96</gadget>
<output>4</output>

<result>4</result>