Kobayashi is reading a famous book. He has read 120 pages in the first week, and 25% of the book has not been finished. How many pages does this famous book have?
小林正在读一本名著，第一周读了120页，还剩下这本书的25%没有读完，这本名著一共有多少页？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">120 / (3/4)</gadget>
<output>160</output>

<result>160</result>