Xiao Ming puts 30 grams of sugar into an empty cup, pours in 240 grams of boiled water, and stirs thoroughly. After drinking half of the sugar water, he adds another 160 grams of boiled water. To make the sugar water in the cup as sweet as before, how many more grams should be added? sugar?
小明把30克糖放入空杯中，倒入240克白开水，充分搅拌，喝去一半糖水后，又加入160克的白开水，要使杯中的糖水和原来一样甜，需要再加多少克的糖？
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">160 * (1/8)</gadget>
<output>20</output>

<result>20</result>