There are 200kg of 10% sugar water in the first basin, and 120kg of 15% sugar water in the second basin. Pour the same amount of water into the two basins so that the concentration of sugar water in the two basins is the same. How much water should be added?
第一个盆里有10%的糖水200kg，第二个盆里有15%的糖水120kg，往两个盆里倒入等量水，使两个盆中的糖水浓度一样，每个盆里倒入的水应是多少？
<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">120 * (3/20) * 200</gadget>
<output>3_600</output>

<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">200 * (1/10) * 120</gadget>
<output>2_400</output>

<gadget id="calculator">3_600 - 2_400</gadget>
<output>1_200</output>

<gadget id="calculator">200 * (1/10)</gadget>
<output>20</output>

<gadget id="calculator">120 * (3/20)</gadget>
<output>18</output>

<gadget id="calculator">20 - 18</gadget>
<output>2</output>

<gadget id="calculator">1_200 / 2</gadget>
<output>600</output>

<result>600</result>