If 40g of salt is completely dissolved in 160g of water, what is the salt content of the resulting brine?
40g盐全部溶化在160g水中，则得到的盐水的含盐率是多少
<gadget id="calculator">40 + 160</gadget>
<output>200</output>

<gadget id="calculator">40 / 200</gadget>
<output>1/5 = around 0.2</output>

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

<gadget id="calculator">(1/5) * 1</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>