There are 300 grams of brine with a concentration of 8% in container A and 120 grams of brine with a concentration of 12.5% in container B. Pour an equal amount of water into the two containers so that the concentration of the brine in the two containers is the same. How much should be poured? grams of water?
甲容器中有浓度为8%的盐水300克，乙容器中有浓度为12.5%的盐水120克，向两容器中分别倒入等量的水，使两容器中盐水浓度相同，需倒入多少克水？
<gadget id="calculator">12.5 / 100</gadget>
<output>0.125</output>

<gadget id="calculator">120 * 0.125 * 300</gadget>
<output>4_500</output>

<gadget id="calculator">8 / 100</gadget>
<output>2/25 = around 0.08</output>

<gadget id="calculator">300 * (2/25) * 120</gadget>
<output>2_880</output>

<gadget id="calculator">4_500 - 2_880</gadget>
<output>1_620</output>

<gadget id="calculator">300 * (2/25)</gadget>
<output>24</output>

<gadget id="calculator">120 * 0.125</gadget>
<output>15</output>

<gadget id="calculator">24 - 15</gadget>
<output>9</output>

<gadget id="calculator">1_620 / 9</gadget>
<output>180</output>

<result>180</result>