There are 400 story books in the library, there are fewer technology books than story books (3/8), how many fewer technology books than story books?
图书馆有故事书400本，科技书比故事书少(3/8)，科技书比故事书少多少本？
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">1 - (3/8)</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">400 * (5/8)</gadget>
<output>250</output>

<gadget id="calculator">400 - 250</gadget>
<output>150</output>

<result>150</result>