Aunt Li bought a batch of apples and sold them yesterday (4/13), which was less than today (3/13). How much did you sell in these two days?
李阿姨进了一批苹果，昨天卖了(4/13)，比今天少卖了(3/13)．这两天共卖了多少？
<gadget id="calculator">4 / 13</gadget>
<output>4/13 = around 0.307692</output>

<gadget id="calculator">3 / 13</gadget>
<output>3/13 = around 0.230769</output>

<gadget id="calculator">(4/13) + (3/13) + (4/13)</gadget>
<output>11/13 = around 0.846154</output>

<result>11/13 = around 0.846154</result>