1000 kg of seawater in a certain place contains 30 kg of salt, what is the salt content of 1 kg of seawater?
某地的海水1000千克含盐30千克，1千克海水含盐多少千克．
<gadget id="calculator">30 / 1_000</gadget>
<output>3/100 = around 0.03</output>

<result>3/100 = around 0.03</result>