A storybook has 300 pages. Xiao Min read it on the first day (1/5) and the second day (4/15). How many pages are left?
一本故事书300页，小敏第一天看了(1/5)，第二天看了(4/15)，还剩下多少页没看？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">4 / 15</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">1 - (1/5) - (4/15)</gadget>
<output>8/15 = around 0.533333</output>

<gadget id="calculator">300 * (8/15)</gadget>
<output>160</output>

<result>160</result>