The school bought 148 story books, and the number of science books is twice that of story books. How many story books and science books are there altogether?
学校买来故事书148本，科技书是故事书的2倍，故事书和科技书一共多少本？
<gadget id="calculator">148 * 2</gadget>
<output>296</output>

<gadget id="calculator">296 + 148</gadget>
<output>444</output>

<result>444</result>