Xiao Pang put all 258 stamps into three stamp books, 86 stamps were put into the first book, and 94 stamps were put into the second book, so how many stamps were put into the last stamp book?
小胖将258张邮票全部放入三本集邮簿，第一本中放入86张邮票，第二本中放入了94张邮票，那么最后一本集邮簿放了多少张邮票？
<gadget id="calculator">258 - 86 - 94</gadget>
<output>78</output>

<result>78</result>