A pile of coal weighs 1600 kg. At the beginning, 125 kg is burned every day. After burning (3/8), the remaining coal is saved by 20% every day. How many more days can it burn?
一堆煤1600千克，开始每天烧125千克，烧完(3/8)以后，余下的每天节约20%，这样还可以烧多少天？
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">1 - (3/8)</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">1_600 * (5/8)</gadget>
<output>1_000</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">125 * (4/5)</gadget>
<output>100</output>

<gadget id="calculator">1_000 / 100</gadget>
<output>10</output>

<result>10</result>