How many kilograms of water are added to 33 kilograms of salt to obtain salt water with a salt content of 33%.
往33千克盐中加入多少千克的水，可得到含盐率33%的盐水．
<gadget id="calculator">33 / 100</gadget>
<output>33/100 = around 0.33</output>

<gadget id="calculator">33 / (33/100)</gadget>
<output>100</output>

<gadget id="calculator">100 - 33</gadget>
<output>67</output>

<result>67</result>