There are 180 people in two groups, A and B, and 1/2 of the number of people in group A is equal to 1/3 of the number of people in group B. How many people are there in group A? How many
甲、乙两组共有180人，甲组人数的1/2和乙组人数的1/3相等，问甲组有多少人？多少
<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">180 * (2/5)</gadget>
<output>72</output>

<result>72</result>