The quotient of the number A divided by the number B is 15. If the number A is reduced to the original (2/3), and the number B is reduced to the original (1/5), what is the quotient?
数A除以数B商是15，如果数A缩小到原来的(2/3)，数B减少原来的(1/5)，商应是多少．
<gadget id="calculator">15 / 1</gadget>
<output>15</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">15 * (2/3)</gadget>
<output>10</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 * (4/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">10 / (4/5)</gadget>
<output>25/2 = around 12.5</output>

<result>25/2 = around 12.5</result>