The number of A is 60, which is 20% more than that of B. What is the number of B?
甲数是60，比乙多20%，乙数是多少．
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">60 / (6/5)</gadget>
<output>50</output>

<result>50</result>