Put 10 grams of salt into 15 grams of water, what is the percentage of salt in the salt water
把10克盐放入15克水中，盐占盐水的多少
<gadget id="calculator">10 + 15</gadget>
<output>25</output>

<gadget id="calculator">10 / 25</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>