barrel of salt water is 200 grams, and the mass ratio of salt to water is 1:24. How many grams of water should be added to make the mass ratio of salt to water in brine be 1:29?
一桶盐水200克，盐和水的质量比是1：24．要使盐水中，盐和水的质量比是1：29，要加入多少克水？
<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">1 + 29</gadget>
<output>30</output>

<gadget id="calculator">1 / 30</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">(1/25) / (1/30)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">200 * (6/5)</gadget>
<output>240</output>

<gadget id="calculator">240 - 200</gadget>
<output>40</output>

<result>40</result>