After a basket of apples is sold (1/5), another 6 kg is sold. Just sold (1/2) of this basket of apples. How many kilograms did this basket of apples originally weigh?
一筐苹果卖掉(1/5)后，又卖掉6千克．正好卖出了这筐苹果的(1/2)．这筐苹果原来有多少千克？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/2) - (1/5)</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">6 / (3/10)</gadget>
<output>20</output>

<result>20</result>