Dongdong reads a story book, reads (1/6) of the whole book on the first day, (3/6) of the whole book on the second day, and reads the whole book by a fraction more on the second day than on the first day ?
冬冬看一本故事书，第一天看了全书的(1/6)，第二天看了全书的(3/6)，第二天比第一天多看了全书的几分之几？
<gadget id="calculator">3 / 6</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(1/2) - (1/6)</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>