Now there is a bottle of 1900 grams of salt water with a salt content of 2%. If you want to turn these brines into 5% salinity, what can you do? Please write down two methods.
现在有一瓶含盐率为2%的盐水1900克．如果要把这些盐水变成含盐率为5%，你有什么办法，请你写出两种做法．
<gadget id="calculator">2 / 100</gadget>
<output>1/50 = around 0.02</output>

<gadget id="calculator">5 / 100</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">(1/50) / (1/20)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1_900 * (2/5)</gadget>
<output>760</output>

<gadget id="calculator">1_900 - 760</gadget>
<output>1_140</output>

<result>1_140</result>