cup of salted boiled water is 100 grams, with a salt content of 5%, and another cup of salted water is 200 grams, with a salt content of 12.5%. If you mix two glasses of salt water and drink half of it, what percentage is the salt content?
一杯盐开水100克，含盐率5%，另一杯盐开水200克，含盐率12.5%．两杯盐水混合在一起，喝掉一半后，含盐率是百分之几？
<gadget id="calculator">5 / 100</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">100 * (1/20)</gadget>
<output>5</output>

<gadget id="calculator">12.5 / 100</gadget>
<output>0.125</output>

<gadget id="calculator">200 * 0.125</gadget>
<output>25</output>

<gadget id="calculator">5 + 25</gadget>
<output>30</output>

<gadget id="calculator">100 + 200</gadget>
<output>300</output>

<gadget id="calculator">30 / 300</gadget>
<output>1/10 = around 0.1</output>

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

<gadget id="calculator">(1/10) * 1</gadget>
<output>1/10 = around 0.1</output>

<result>1/10 = around 0.1</result>