A piece of ice loses half of its weight every hour, and its weight is 1 kilogram after eight hours. What is the initial weight of the ice in kilograms?
一块冰，每小时失去其重量的一半，八小时后其重量为1千克，那么一开始这块冰的重量是多少千克．
<gadget id="calculator">1 * 2 * 2 * 2 * 2 * 2 * 2 * 2 * 2</gadget>
<output>256</output>

<result>256</result>