After a basket of apples is taken out (1/5), another 3kg is taken out, and the mass taken out at this time is exactly (1/2) of the remaining mass. How many kilograms did this basket of apples originally weigh?
一筐苹果取出(1/5)后，又取出3kg，这时取出的质量正好是剩下质量的(1/2)，这筐苹果原来有多少千克？
<gadget id="calculator">1 + 2</gadget>
<output>3</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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

<gadget id="calculator">(1/3) - (1/5)</gadget>
<output>2/15 = around 0.133333</output>

<gadget id="calculator">3 / (2/15)</gadget>
<output>45/2 = around 22.5</output>

<result>45/2 = around 22.5</result>