A pile of coal, 1200 kg was transported away on the first day, accounting for 40% of the coal, and it happened to be shipped out on the second day. How many tons of coal were transported the next day?
一堆煤，第一天运走1200千克，占这堆煤的40%，第二天正好运完．第二天运走煤多少吨？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1_200 / (2/5)</gadget>
<output>3_000</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(3/5) / 1_000</gadget>
<output>3/5_000 = around 0.0006</output>

<gadget id="calculator">3_000 * (3/5_000)</gadget>
<output>9/5 = around 1.8</output>

<result>9/5 = around 1.8</result>