A piece of ice loses half of its mass every 1 hour, and its mass is (5/16) kg after 8 hours. What is the mass of this piece of ice at the beginning?
一块冰，每1小时失去质量的一半，8小时后其质量为(5/16)kg，那么一开始这块冰的质量是多少？
<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>