A piece of ice loses half of its weight every hour. After eight hours, its weight is (5/16) kilograms. What is the initial weight of this piece of ice in kilograms?
一块冰，每小时失去其重量的一半，八小时之后其重量为(5/16)千克，那么一开始这块冰的重量是多少千克．
<gadget id="calculator">5 / 16</gadget>
<output>5/16 = around 0.3125</output>

<gadget id="calculator">(5/16) * 2 * 2 * 2 * 2 * 2 * 2 * 2 * 2</gadget>
<output>80</output>

<result>80</result>