Dissolve 50g of salt in 1kg of water, what is the percentage of salt in the brine?
把50克盐溶于1千克水中，这时盐占盐水的多少
<gadget id="calculator">1 * 1_000</gadget>
<output>1_000</output>

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