Wang Qiang went to the Book City yesterday to buy a set of story books for 124 yuan and a set of science fiction books for 98 yuan. He paid the salesperson 300 yuan. How much should the salesperson get back?
王强昨天去图书城买了一套124元的故事书和一套98元的科幻书，他付给营业员300元，营业员应该找回多少元？
<gadget id="calculator">124 + 98</gadget>
<output>222</output>

<gadget id="calculator">300 - 222</gadget>
<output>78</output>

<result>78</result>