The numerator of a fraction is enlarged to 5 times of the original, and the denominator is reduced to the original (1/5) is (10/3), what is the original fraction.
一个分数的分子扩大到原来的5倍，分母缩小到原来的(1/5)是(10/3)，原分数是多少．
<gadget id="calculator">5 / 1</gadget>
<output>5</output>

<gadget id="calculator">3 * 5</gadget>
<output>15</output>

<gadget id="calculator">10 / 5 / 15</gadget>
<output>2/15 = around 0.133333</output>

<result>2/15 = around 0.133333</result>