Adding 3 to the numerator of a simplest true fraction is (3/5), and subtracting 4 from the denominator is (1/2). What is the fraction?
一个最简真分数的分子加上3是(3/5)，分母减去4是(1/2)，这个分数是多少．
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<result>3/10 = around 0.3</result>