2 kg of salt water contains 100 grams of salt, what is the amount of salt in salt water?
2千克盐水含盐100克，盐是盐水的多少．
<gadget id="calculator">2 * 1_000</gadget>
<output>2_000</output>

<gadget id="calculator">100 / 2_000</gadget>
<output>1/20 = around 0.05</output>

<result>1/20 = around 0.05</result>