The weight ratio of salt to water in a bottle of salt water is 1:24. If 75 grams of water are added, the weight ratio of salt to water is 1:27. How many kilograms of salt water in the original bottle weighs?
一瓶盐水，盐和水的重量比是1：24，如果再放入75克水，这时盐与水的重量比是1：27，原来瓶内盐水重多少千克？
<gadget id="calculator">27 / 1</gadget>
<output>27</output>

<gadget id="calculator">24 / 1</gadget>
<output>24</output>

<gadget id="calculator">27 - 24</gadget>
<output>3</output>

<gadget id="calculator">75 / 3</gadget>
<output>25</output>

<gadget id="calculator">1 + 24</gadget>
<output>25</output>

<gadget id="calculator">1 / 25</gadget>
<output>1/25 = around 0.04</output>

<gadget id="calculator">25 / (1/25)</gadget>
<output>625</output>

<result>625</result>