Students participate in extracurricular activities. There are 25 people in the painting and calligraphy group, and the number of people in the chorus group is four times that of the painting and calligraphy group. How many people are fewer in the painting and calligraphy group than in the chorus group?
同学们参加课外活动．书画组有25人，合唱组的人数是书画组的4倍，书画组比合唱组少多少人？
<gadget id="calculator">4 - 1</gadget>
<output>3</output>

<gadget id="calculator">25 * 3</gadget>
<output>75</output>

<result>75</result>