For a pile of coal, (3/8) of the total amount is removed first, and (1/3) of the total amount is removed second time. What is the remaining amount of the total amount after the second removal.
一堆煤，第一运走总数的(3/8)，第二次运走总数的(1/3)，运走两次后还剩总数的多少．
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (3/8) - (1/3)</gadget>
<output>7/24 = around 0.291667</output>

<result>7/24 = around 0.291667</result>