Mix 500 grams of brine with a salt content of 22% and 300 grams of brine with a salt content of 10%. What is the salt content of the brine solution after mixing?
把含盐率为22%的盐水500克和含盐率为10%的盐水300克混合，混合后盐水溶液的含盐率是多少？
<gadget id="calculator">22 / 100</gadget>
<output>11/50 = around 0.22</output>

<gadget id="calculator">500 * (11/50)</gadget>
<output>110</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">110 + 30</gadget>
<output>140</output>

<gadget id="calculator">500 + 300</gadget>
<output>800</output>

<gadget id="calculator">140 / 800</gadget>
<output>7/40 = around 0.175</output>

<result>7/40 = around 0.175</result>