There are 30 kilograms of apples in the store, and (1/3) of them are sold on the first day, and (2/5) of them are sold on the second day. How many kilograms of apples are sold in these two days?
商店有30千克苹果，第一天卖出它的(1/3)，第二天卖出它的(2/5)，这两天共卖出多少千克苹果．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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

<gadget id="calculator">(1/3) + (2/5)</gadget>
<output>11/15 = around 0.733333</output>

<gadget id="calculator">30 * (11/15)</gadget>
<output>22</output>

<result>22</result>