If 20 grams of salt is dissolved in 60 grams of water, what is the salt content of the salt water?
把20克盐溶解到60克水中，盐水的含盐率是多少．
<gadget id="calculator">20 + 60</gadget>
<output>80</output>

<gadget id="calculator">20 / 80</gadget>
<output>1/4 = around 0.25</output>

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

<gadget id="calculator">(1/4) * 1</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>