When water freezes, the volume of ice increases (1/15) compared to water, and when ice turns into water, the volume of water decreases by how much.
水结成冰时，冰的体积比水增加(1/15)，当冰化成水时，水的体积比冰减少多少．
<gadget id="calculator">1 / 15</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">1 + (1/15)</gadget>
<output>16/15 = around 1.066667</output>

<gadget id="calculator">1 * (16/15)</gadget>
<output>16/15 = around 1.066667</output>

<gadget id="calculator">(16/15) - 1</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">(1/15) / (16/15)</gadget>
<output>1/16 = around 0.0625</output>

<result>1/16 = around 0.0625</result>