The ratio of salt to water in a tank of salt water is 2:18, and the water weighs 300 kg more than the salt. How much does the tank of salt water weigh?
一罐盐水中盐与水的比是2：18，水比盐重300千克，问这罐盐水重多少千克？
<gadget id="calculator">18 - 2</gadget>
<output>16</output>

<gadget id="calculator">300 / 16</gadget>
<output>75/4 = around 18.75</output>

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

<gadget id="calculator">(75/4) * 20</gadget>
<output>375</output>

<result>375</result>