A cartoon picture book has 75 pages, Xiaohao read it (2/5), how many pages are left?
一本卡通画册有75页，小浩看了它的(2/5)，还剩多少页？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">75 * (2/5)</gadget>
<output>30</output>

<gadget id="calculator">75 - 30</gadget>
<output>45</output>

<result>45</result>