There are 172 story books in the book corner of Class 1, Grade 1, and the number of science books is (3/4) that of story books. How many fewer science and technology books than story books.
一年级1班的图书角有172本故事书，科技书的本数是故事书的(3/4)．科技书比故事书少多少本．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">172 * (1/4)</gadget>
<output>43</output>

<result>43</result>