If 50 grams of salt is added to 200 grams of 15% brine, what is the concentration of the brine?
200克浓度为15%的盐水中加入50克盐，这时盐水浓度变为多少
<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">200 * (3/20)</gadget>
<output>30</output>

<gadget id="calculator">30 + 50</gadget>
<output>80</output>

<gadget id="calculator">200 + 50</gadget>
<output>250</output>

<gadget id="calculator">80 / 250</gadget>
<output>8/25 = around 0.32</output>

<result>8/25 = around 0.32</result>