There are 20 kilograms of salt water, of which salt accounts for (1/4) of the salt water. If you add 1 kg of salt and 4 kg of water, then the salt accounts for ((())/(())) of the brine.
有20千克盐水，其中盐占盐水的(1/4)．如果再加1千克盐和4千克水，那么盐占盐水的((())/(()))．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">20 * (1/4)</gadget>
<output>5</output>

<gadget id="calculator">5 + 1</gadget>
<output>6</output>

<gadget id="calculator">20 + 1 + 4</gadget>
<output>25</output>

<gadget id="calculator">6 / 25</gadget>
<output>6/25 = around 0.24</output>

<result>6/25 = around 0.24</result>