A bottle of oil weighs 1.7 kilograms. After half of the bottle is used up, the weight of the bottle is 0.95 kilograms. How many kilograms of oil are there in the original bottle?
一瓶油连瓶重1.7千克，用去一半后连瓶重0.95千克，原来瓶中有油多少千克？
<gadget id="calculator">1.7 - 0.95</gadget>
<output>0.75</output>

<gadget id="calculator">0.75 * 2</gadget>
<output>1.5</output>

<result>1.5</result>