A glass of salt water weighs 80 grams, and the ratio of salt to water is 1:19. Now, to dilute this glass of salt water until the ratio of salt to water is 1:25, how many grams of water need to be added?
一杯盐水重80克，盐与水的比是1：19，现在要使这杯盐水变淡，直到盐与水的比是1：25，需要加水多少克？
<gadget id="calculator">1 + 19</gadget>
<output>20</output>

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

<gadget id="calculator">1 + 25</gadget>
<output>26</output>

<gadget id="calculator">1 / 26</gadget>
<output>1/26 = around 0.038462</output>

<gadget id="calculator">(1/20) / (1/26)</gadget>
<output>13/10 = around 1.3</output>

<gadget id="calculator">80 * (13/10)</gadget>
<output>104</output>

<gadget id="calculator">104 - 80</gadget>
<output>24</output>

<result>24</result>