There are 25 people in the model airplane group of the school, the number of people in the dance group is (5/7), the number of people in the dance group is the calligraphy group (7/8), how many people are there in the calligraphy group?
学校航模小组有25人，是舞蹈组人数的(5/7)，舞蹈组的人数是书法组的(7/8)，书法组有多少人？
<gadget id="calculator">5 / 7</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">25 / (5/7) / (7/8)</gadget>
<output>40</output>

<result>40</result>