Pony reads a 121-page story book, the ratio of the number of pages he has read to the total number of pages is 6:11, how many pages are left unread?
小马看一本121页的故事书，已看的页数和总页数的比是6：11，还有多少页没看？
<gadget id="calculator">11 - 6</gadget>
<output>5</output>

<gadget id="calculator">5 / 11</gadget>
<output>5/11 = around 0.454545</output>

<gadget id="calculator">121 * (5/11)</gadget>
<output>55</output>

<result>55</result>