Teacher Li went to the stationery store to buy 12 notebooks at 8 yuan each. Teacher Li paid 100 yuan. How much should the salesperson get back? (column comprehensive formula calculation)
李老师到文化用品商店买12本笔记本，每本8元，李老师付了100元钱，营业员应该找回多少钱？(列综合算式计算)
<gadget id="calculator">12 * 8</gadget>
<output>96</output>

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

<result>4</result>