The first pile of two piles of coal is more (1/5) than the second pile, and the second pile is 75kg less than the first pile. How many kilograms do the two piles of coal weigh together?
两堆煤第一堆比第二堆多(1/5)，第二堆比第一堆少75kg．两堆煤共重多少千克？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

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

<gadget id="calculator">1 - 5</gadget>
<output>-4</output>

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

<gadget id="calculator">75 / 1</gadget>
<output>75</output>

<gadget id="calculator">5 + 1 + 5</gadget>
<output>11</output>

<gadget id="calculator">75 * 11</gadget>
<output>825</output>

<result>825</result>