There used to be 198 storybooks in the school library, but 96 were lent out on May 30, and 47 were returned. How many storybooks are there in the school library now?
学校图书室里原来有故事书198本，5月30号借出96本，还回47本，学校图书室里现在有故事书多少本？
<gadget id="calculator">198 - 96</gadget>
<output>102</output>

<gadget id="calculator">102 + 47</gadget>
<output>149</output>

<result>149</result>