If 69 kilograms of salt can be extracted from 3 tons of seawater, how many grams of salt can be extracted from 15 tons of seawater?
如果3吨海水可以提炼69千克盐，那么15吨海水可以提炼多少克盐？
<gadget id="calculator">69 / 3</gadget>
<output>23</output>

<gadget id="calculator">1 / 15</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">23 / (1/15)</gadget>
<output>345</output>

<gadget id="calculator">345 * 1_000</gadget>
<output>345_000</output>

<result>345_000</result>