20 kg of toffee, sell (1/4) of it and then sell (1/4) kg. How many kilograms were sold in total.
20千克奶糖，卖出它的(1/4)后又卖出(1/4)千克．共卖出多少千克．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">20 * (1/4)</gadget>
<output>5</output>

<gadget id="calculator">5 + (1/4)</gadget>
<output>21/4 = around 5.25</output>

<result>21/4 = around 5.25</result>