If 60 grams of salt water with a concentration of 25% is to be diluted into salt water with a concentration of 6%, how many grams of water should be added?
浓度为25%的盐水60克，要稀释成浓度为6%的盐水，应该加水多少克？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">6 / 100</gadget>
<output>3/50 = around 0.06</output>

<gadget id="calculator">(1/4) / (3/50)</gadget>
<output>25/6 = around 4.166667</output>

<gadget id="calculator">60 * (25/6)</gadget>
<output>250</output>

<gadget id="calculator">250 - 60</gadget>
<output>190</output>

<result>190</result>