600 grams of 60% alcohol solution is mixed with 400 grams of 30% alcohol solution. What is the concentration of the alcohol solution obtained after mixing?
浓度为60%的酒精溶液600克，与浓度为30%的酒精溶液400克，混合后所得到的酒精溶液的浓度是多少？
<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">600 * (3/5)</gadget>
<output>360</output>

<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">400 * (3/10)</gadget>
<output>120</output>

<gadget id="calculator">360 + 120</gadget>
<output>480</output>

<gadget id="calculator">400 + 600</gadget>
<output>1_000</output>

<gadget id="calculator">480 / 1_000</gadget>
<output>12/25 = around 0.48</output>

<result>12/25 = around 0.48</result>