Xiaohua reads an extra-curricular book, and has already read 40 pages, but he just didn't read it (1/3). How many pages does this extracurricular book have?
小华看一本课外书，已经看了40页，正好是没有看的(1/3)．这本课外书共有多少页？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">40 / (1/3)</gadget>
<output>120</output>

<gadget id="calculator">120 + 40</gadget>
<output>160</output>

<result>160</result>