10 kg of seawater in a certain place contains 0.3 kg of salt. According to this calculation, how many kilograms of salt is contained in 1 ton of seawater.
某地的海水10千克含盐0.3千克．照这样计算，1吨海水含盐多少千克．
<gadget id="calculator">0.3 / 10</gadget>
<output>0.03</output>

<gadget id="calculator">0.03 * 1 * 1_000</gadget>
<output>30</output>

<result>30</result>