In July of a certain year, the rainy days are sunny (2/3), and the cloudy days are sunny (2/5). How many days are there sunny days in this month?
某年七月份雨天是晴天的(2/3)，阴天是晴天的(2/5)，这个月晴天有几天？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 + (2/3) + (2/5)</gadget>
<output>31/15 = around 2.066667</output>

<gadget id="calculator">31 / (31/15)</gadget>
<output>15</output>

<result>15</result>