In the chemistry experiment class, Wang Lu and Zhao Dan were preparing sulfuric acid solution. Wang Lu prepared 300 grams of sulfuric acid solution with a concentration of 8%, and Zhao Dan prepared 120 grams of sulfuric acid solution with a concentration of 12.5%. Now two people are asked to add the same amount of water to make the sulfuric acid solution prepared by the two people have the same concentration. How many grams of water should be added to each solution?
在化学实验课上，王璐和赵丹两人在配制硫酸溶液，王璐配制了浓度为8%的硫酸溶液300克，赵丹配制了浓度为12.5%的硫酸溶液120克．现在要求两人分别加入等量的水，使两人配制的硫酸溶液浓度相同，每种溶液中需加水多少克？
<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>