A barrel of oil originally weighed 580 grams, but 256 grams were used for the first time, and 96 grams remained after the second use. How many grams were used for the second time?
一桶油原来重580克，第一次用去了256克，用完第二次后还剩96克，第二次用了多少克？
<gadget id="calculator">508 - 256 - 96</gadget>
<output>156</output>

<result>156</result>