Put 3 grams of salt into 10 grams of water, what is the percentage of salt in the salt water?
把3克盐放入10克水中，盐占盐水的多少．
<gadget id="calculator">3 + 10</gadget>
<output>13</output>

<gadget id="calculator">3 / 13</gadget>
<output>3/13 = around 0.230769</output>

<result>3/13 = around 0.230769</result>