The number of students in the school's art class is equal to that of the calligraphy class (5/12). After 16 students in the calligraphy class are transferred to the art class, the number of students in the art class is equal to that of the calligraphy class (3/4). Q: How many students are there in calligraphy class and art class?
学校美术班的人数是书法班人数的(5/12)，书法班里有16名同学转入美术班后，美术班的人数是书法班的(3/4)．问：书法班和美术班共有多少名同学？
<gadget id="calculator">4 + 3</gadget>
<output>7</output>

<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">12 + 5</gadget>
<output>17</output>

<gadget id="calculator">5 / 17</gadget>
<output>5/17 = around 0.294118</output>

<gadget id="calculator">(3/7) - (5/17)</gadget>
<output>16/119 = around 0.134454</output>

<gadget id="calculator">16 / (16/119)</gadget>
<output>119</output>

<result>119</result>