The product of the numerator and denominator of a fraction is 18, and the sum is 19. What is the simplest true fraction?
一个分数的分子和分母的积是18，和是19，这个最简真分数是多少．
<gadget id="calculator">1 / 18</gadget>
<output>1/18 = around 0.055556</output>

<result>1/18 = around 0.055556</result>