The three engineering teams A, B and C have a total of 270 people. Due to work needs, 15 people are sent from each of the two teams to the C team. This is A:B:C=1:2:3, how much is the original team B? people.
甲、乙、丙三个工程队共有270人，因工作需要，从甲、乙两队各出15人到丙队，这是甲：乙：丙=1：2：3，乙队原有多少人．
<gadget id="calculator">1 + 2 + 3</gadget>
<output>6</output>

<gadget id="calculator">2 / 6</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">270 * (1/3)</gadget>
<output>90</output>

<gadget id="calculator">90 + 15</gadget>
<output>105</output>

<result>105</result>