There is a heap of coal, 1/8 of the total amount is used on the first day, and the ratio of what is used on the second day to the first day is 4:3, leaving 680 kilograms. How many kilograms of this pile of coal are there?
有堆煤，第一天用去总数的(1/8)，第二天用的与第一天的比是4：3，还剩下680千克，这堆煤共多少千克．
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">4 / 3</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">(1/8) * (4/3)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 - (1/8) - (1/6)</gadget>
<output>17/24 = around 0.708333</output>

<gadget id="calculator">680 / (17/24)</gadget>
<output>960</output>

<result>960</result>