The sum of A, B, and C is 1160, A is half of B, and B is twice C. Then how much is B?
甲、乙、丙三数之和是1160，甲是乙的一半，乙是丙的2倍．那么乙是多少．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) + 1 + (1/2)</gadget>
<output>2</output>

<gadget id="calculator">1_160 / 2</gadget>
<output>580</output>

<result>580</result>