The sum of the three numbers A, B, and C is 42, and their ratio is 1:2:3. What is the number B?
甲乙丙三个数的和是42，它们的比是1：2：3，则乙数是多少
<gadget id="calculator">1 + 2 + 3</gadget>
<output>6</output>

<gadget id="calculator">42 / 6</gadget>
<output>7</output>

<gadget id="calculator">7 * 2</gadget>
<output>14</output>

<result>14</result>