basket of eggs, I ate all (1/3) on the first day, and the rest (1/3) on the second day, and there are 4 eggs left, how many eggs are there in this basket?
一筐鸡蛋，第一天吃了全部的(1/3)，第二天吃了剩下的(1/3)，还剩4个，原来这筐鸡蛋有多少个？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(2/3) * (1/3)</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">1 - (1/3) - (2/9)</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">4 / (4/9)</gadget>
<output>9</output>

<result>9</result>