Put 10 kg of oil in three pots of equal mass. The weight of the first jug and jug is 4 kg, the weight of the second jug and jug is (13/4) kg, and the weight of the third jug and jug is (15/4) kg. What is the mass of each jug in kilograms?
把10千克油分别装在三个质量相等的壶内．第一壶连壶共重4千克，第二壶连壶共重(13/4)千克，第三壶连壶共重(15/4)千克．每个壶的质量是多少千克？
<gadget id="calculator">13 / 4</gadget>
<output>13/4 = around 3.25</output>

<gadget id="calculator">15 / 4</gadget>
<output>15/4 = around 3.75</output>

<gadget id="calculator">(15/4) - 10</gadget>
<output>-25/4 = around -6.25</output>

<gadget id="calculator">4 + (13/4) + (-25/4)</gadget>
<output>1</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>