There are 300 grams of 16% saline in container A and 120 grams of 25% saline in container B. Pour an equal amount of water into two containers, A and B, so that the concentration of salt water in the two containers is the same. How many grams of water is poured.
甲容器中有16%的食盐水300克，乙容器中有25%的食盐水120克．往甲、乙两个容器分别倒入等量的水，使两个容器的食盐水浓度一样．倒入的水有多少克．
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">120 * (1/4) * 300</gadget>
<output>9_000</output>

<gadget id="calculator">16 / 100</gadget>
<output>4/25 = around 0.16</output>

<gadget id="calculator">300 * (4/25) * 120</gadget>
<output>5_760</output>

<gadget id="calculator">9_000 - 5_760</gadget>
<output>3_240</output>

<gadget id="calculator">300 * (4/25)</gadget>
<output>48</output>

<gadget id="calculator">120 * (1/4)</gadget>
<output>30</output>

<gadget id="calculator">48 - 30</gadget>
<output>18</output>

<gadget id="calculator">3_240 / 18</gadget>
<output>180</output>

<result>180</result>