A book has 240 pages. I read (1/6) of the whole book on the first day and 20% of the whole book on the second day. How many pages are left?
一本书240页，第一天看了全书的(1/6)，第二天看全书的20%，还剩下多少页没有看？
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/6) - (1/5)</gadget>
<output>19/30 = around 0.633333</output>

<gadget id="calculator">240 * (19/30)</gadget>
<output>152</output>

<result>152</result>