There are 48 students in class one and 42 students in class two, how many students are transferred from class one to class two, the ratio of the number of students in class one to class two is 4:5?
一班有48名学生，二班有42名学生，从一班调几名学生到二班，一班与二班的人数比就是4：5？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(4/5) * 42</gadget>
<output>168/5 = around 33.6</output>

<gadget id="calculator">48 - (168/5)</gadget>
<output>72/5 = around 14.4</output>

<gadget id="calculator">1 + (4/5)</gadget>
<output>9/5 = around 1.8</output>

<gadget id="calculator">(72/5) / (9/5)</gadget>
<output>8</output>

<result>8</result>