After part of a barrel of oil is poured out, (5/8) remains. The remaining 5 days are used up, with an average of (3/4) kilograms per day. How many kilograms is this barrel of oil originally?
一桶油倒出一部分后，剩下(5/8)．剩下的5天用完，平均每天用(3/4)千克．这桶油原来有多少千克？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">5 / (5/8)</gadget>
<output>8</output>

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

<result>6</result>