In a bottle of salt water, the weight ratio of salt to water is 1:23. If 60 grams of water are added, the weight ratio of salt to water is 1:27. How much is the weight of the salt in the bottle?
一瓶盐水，盐和水的重量比是1：23，如果再放入60克水，这时盐与水的重量比是1：27，原来瓶内盐重多少千克？
<gadget id="calculator">27 / 1</gadget>
<output>27</output>

<gadget id="calculator">23 / 1</gadget>
<output>23</output>

<gadget id="calculator">27 - 23</gadget>
<output>4</output>

<gadget id="calculator">60 / 4 / 1_000</gadget>
<output>3/200 = around 0.015</output>

<result>3/200 = around 0.015</result>