There are 3 grams of salt and 100 grams of water in brine, plus 2 grams of salt, the salt accounts for ((())/(())) of the brine.
盐水中有3克盐和100克水，再加上2克盐，盐占盐水的((())/(()))．
<gadget id="calculator">3 + 2</gadget>
<output>5</output>

<gadget id="calculator">3 + 100 + 2</gadget>
<output>105</output>

<gadget id="calculator">5 / 105</gadget>
<output>1/21 = around 0.047619</output>

<result>1/21 = around 0.047619</result>