Dissolve 50 grams of salt in 1 kilogram of water, what is the percentage of salt in the salt water?
在1千克水中溶入50克盐，这时盐占盐水的多少
<gadget id="calculator">1 * 1_000</gadget>
<output>1_000</output>

<gadget id="calculator">1_000 + 50</gadget>
<output>1_050</output>

<gadget id="calculator">50 / 1_050</gadget>
<output>1/21 = around 0.047619</output>

<result>1/21 = around 0.047619</result>