If 80 grams of salt water with a concentration of 24% is added, how many grams of water are added, and the salt content is 12%.
浓度24%的盐水80克，加入多少克水，含盐率为12%．
<gadget id="calculator">24 / 100</gadget>
<output>6/25 = around 0.24</output>

<gadget id="calculator">12 / 100</gadget>
<output>3/25 = around 0.12</output>

<gadget id="calculator">80 / (3/25)</gadget>
<output>2_000/3 = around 666.666667</output>

<gadget id="calculator">(6/25) * (2_000/3)</gadget>
<output>160</output>

<gadget id="calculator">160 - 80</gadget>
<output>80</output>

<result>80</result>