There are 23 students in the science and technology group, 13 students in the art group, and twice as many students in the calligraphy group as the art group. How many more people are in the calligraphy group than in the technology group?
学校科技组有23名同学，美术组有13名，书法组的人数是美术组的2倍．书法组的人数比科技组多多少人？
<gadget id="calculator">13 * 2</gadget>
<output>26</output>

<gadget id="calculator">26 - 23</gadget>
<output>3</output>

<result>3</result>