Add a certain amount of water to 45% alcohol to dilute the 36% alcohol solution. If the same amount of water is added, what will be the concentration of the alcohol solution?
给浓度为45%的酒精加入一定量的水稀释城浓度为36%的酒精溶液，如果又加入同样多的水，那么酒精溶液的浓度将变为多少．
<gadget id="calculator">45 / 100</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">100 * (9/20)</gadget>
<output>45</output>

<gadget id="calculator">36 / 100</gadget>
<output>9/25 = around 0.36</output>

<gadget id="calculator">45 / (9/25)</gadget>
<output>125</output>

<gadget id="calculator">125 - 100</gadget>
<output>25</output>

<gadget id="calculator">125 + 25</gadget>
<output>150</output>

<gadget id="calculator">45 / 150</gadget>
<output>3/10 = around 0.3</output>

<result>3/10 = around 0.3</result>