Lingling has 19 story books and 6 science books. How many science books are there are story books?
玲玲有故事书19本，科技书6本，科技书是故事书的多少．
<gadget id="calculator">6 / 19</gadget>
<output>6/19 = around 0.315789</output>

<result>6/19 = around 0.315789</result>