250 grams of 10% sugar water is mixed with 20% sugar water to make 12% sugar water. How many grams is the final sugar water?
浓度为10%的糖水250克，与浓度为20%的糖水混合，配成了浓度为12%的糖水，最终的糖水有多少克？
<gadget id="calculator">30 - 25</gadget>
<output>5</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) - 0.12</gadget>
<output>0.08</output>

<gadget id="calculator">5 / 0.08</gadget>
<output>62.5</output>

<gadget id="calculator">62.5 + 250</gadget>
<output>312.5</output>

<result>312.5</result>