Put 20 grams of salt into 100 grams of water to prepare brine, how many grams of salt are in 300 grams of such brine?
把20克盐放入100克水里配制成盐水，300克这样的盐水中含盐多少克．
<gadget id="calculator">100 + 20</gadget>
<output>120</output>

<gadget id="calculator">20 / 120</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">300 * (1/6)</gadget>
<output>50</output>

<result>50</result>