A basket of apples weighs 49 kg. After selling (2/3), the remaining basket weighs 29 kg. How many kilograms does the basket weigh?
一筐苹果连筐重49千克，卖出(2/3)后，剩下的连筐重29千克．筐重多少千克？
<gadget id="calculator">49 - 29</gadget>
<output>20</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">20 / (2/3)</gadget>
<output>30</output>

<gadget id="calculator">49 - 30</gadget>
<output>19</output>

<result>19</result>