A barrel of oil weighs 15 kilograms, and 40% of it is used up. The remaining oil is packed into 12 small bottles on average. How many kilograms are contained in each small bottle?
一桶油重15千克，用掉了它的40%，剩下的油平均装到12个小瓶子，每个小瓶子装多少千克？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(3/5) / 12</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">15 * (1/20)</gadget>
<output>3/4 = around 0.75</output>

<result>3/4 = around 0.75</result>