Xiao Ming reads a story book, and has already read (3/5) of the whole book, and has 60 pages left. How many pages has he read?
小明看一本故事书，已经看了全书的(3/5)，还有60页没看．他已经看了多少页？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">60 / (2/5)</gadget>
<output>150</output>

<gadget id="calculator">150 * (3/5)</gadget>
<output>90</output>

<result>90</result>