A salt water, the mass ratio of salt to salt water is 1:25. There are 5 grams of salt, how many grams of water should be added to make brine with this mass ratio?
一种盐水，盐与盐水的质量比是1：25．现有5克盐，应该放入多少克水才能配置成这种质量比的盐水？
<gadget id="calculator">1 / 25</gadget>
<output>1/25 = around 0.04</output>

<gadget id="calculator">5 / (1/25)</gadget>
<output>125</output>

<gadget id="calculator">1 - (1/25)</gadget>
<output>24/25 = around 0.96</output>

<gadget id="calculator">125 * (24/25)</gadget>
<output>120</output>

<result>120</result>