There are 54 people in two groups, A (1/4) and B (1/5) are equal. How many people are in group A than group B?
甲乙两组共54人，甲组人数的(1/4)与乙组人数的(1/5)相等．甲组比乙组少多少人？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">54 * (1/5)</gadget>
<output>54/5 = around 10.8</output>

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

<gadget id="calculator">(1/4) + (1/5)</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">(54/5) / (9/20)</gadget>
<output>24</output>

<gadget id="calculator">54 - 24 - 24</gadget>
<output>6</output>

<result>6</result>