If you mix 200 grams of 15% salt water with 300 grams of 10% salt water, what is the percentage of salt in the resulting salt water?
把含盐15%的盐水200克和含盐10%的盐水300克混合在一起，得到的盐水含盐百分比是多少．
<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">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">300 * (1/10)</gadget>
<output>30</output>

<gadget id="calculator">30 + 30</gadget>
<output>60</output>

<gadget id="calculator">200 + 300</gadget>
<output>500</output>

<gadget id="calculator">60 / 500</gadget>
<output>3/25 = around 0.12</output>

<gadget id="calculator">100 / 100</gadget>
<output>1</output>

<gadget id="calculator">(3/25) * 1</gadget>
<output>3/25 = around 0.12</output>

<result>3/25 = around 0.12</result>