There are 45 people in both classes A and B. If 5 people are transferred from class B to class A, the number of people in class A will be much larger than the number of people in class B.
甲乙两班都有45人，如果从乙班调5人到甲班，则甲班人数就比乙班人数多多少
<gadget id="calculator">45 + 5</gadget>
<output>50</output>

<gadget id="calculator">45 - 5</gadget>
<output>40</output>

<gadget id="calculator">50 - 40</gadget>
<output>10</output>

<gadget id="calculator">10 / 40</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>