Xiao Ming is reading a book of fairy tales. There are 350 pages in this book, and there are still (3/7) left to read. How many pages does he have to read?
小明同学看一本童话故事书，这本书共有350页，还剩下(3/7)没有看，他还有多少页没有看完？
<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">350 * (3/7)</gadget>
<output>150</output>

<result>150</result>