There are 100 pages in a book, and 71 pages have been read, what fraction of the whole book is not read?
一本有100页，已看了71页，未看的是全书的几分之几？
<gadget id="calculator">100 - 71</gadget>
<output>29</output>

<gadget id="calculator">29 / 100</gadget>
<output>29/100 = around 0.29</output>

<result>29/100 = around 0.29</result>