The ratio of A and B is 1:2. It is known that A is 108. What is the sum of A and B?
甲、乙两数的比是1：2，已知甲是108，甲、乙两数的和是多少？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">108 / (1/2)</gadget>
<output>216</output>

<gadget id="calculator">216 + 108</gadget>
<output>324</output>

<result>324</result>