Kindergarten buys two kinds of candy, A and B, for 280 yuan. Type A sugar is 12 yuan per kilogram. It is known that the number of kilograms purchased for type A sugar is twice the unit price of type B sugar, and the number of kilograms purchased for type B sugar is exactly (1/3) of the unit price of type A sugar. How much is B sugar per kilogram?
幼儿园购买甲、乙两种糖共用去280元．甲种糖每千克12元．已知购买甲种糖的千克数是乙种糖单价数的2倍，购买乙种糖的千克数正好是甲种糖单价数的(1/3)．乙种糖每千克多少元？
<gadget id="calculator">12 * 2</gadget>
<output>24</output>

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

<gadget id="calculator">12 * (1/3)</gadget>
<output>4</output>

<gadget id="calculator">24 + 4</gadget>
<output>28</output>

<gadget id="calculator">280 / 28</gadget>
<output>10</output>

<result>10</result>