There are 156 people in workshop A and workshop B. The ratio of the number of people in the two workshops is 5:7. How many people are there in workshop A?
甲乙两车间一共有156人，两车间人数的比是5：7，甲车间有多少人．
<gadget id="calculator">5 + 7</gadget>
<output>12</output>

<gadget id="calculator">156 / 12</gadget>
<output>13</output>

<gadget id="calculator">13 * 5</gadget>
<output>65</output>

<result>65</result>