There are 414 people in a chemical workshop, and they are divided into three groups. The ratio of the number of people in the first group to the second group is 2:3, and the ratio of the number of people in the second group to the third group is 5:7. How many people are there in the second group?
化工车间有414人，共分成三组，一组和二组的人数比是2：3，二组和三组的人数比是5：7，问二组有多少人．
<gadget id="calculator">10 + 15 + 21</gadget>
<output>46</output>

<gadget id="calculator">15 / 46</gadget>
<output>15/46 = around 0.326087</output>

<gadget id="calculator">414 * (15/46)</gadget>
<output>135</output>

<result>135</result>