If 100 grams of salt is added to 900 grams of water, what is the salt content of the brine?
把100克盐加入900克水中，这种盐水的含盐率是多少
<gadget id="calculator">100 + 900</gadget>
<output>1_000</output>

<gadget id="calculator">100 / 1_000</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>