Put 2 grams of salt in 18 grams of water, what is the concentration of salt water
把2克盐放入18克水中，盐水的浓度为多少
<gadget id="calculator">2 + 18</gadget>
<output>20</output>

<gadget id="calculator">2 / 20</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">100 / 100</gadget>
<output>1</output>

<gadget id="calculator">(1/10) * 1</gadget>
<output>1/10 = around 0.1</output>

<result>1/10 = around 0.1</result>