The sum of A and B is 180. The ratio of A to B is 7:2. What is A?
甲乙两数的和是180，甲数与乙数的比是7：2，甲数是多少
<gadget id="calculator">7 + 2</gadget>
<output>9</output>

<gadget id="calculator">180 / 9</gadget>
<output>20</output>

<gadget id="calculator">20 * 7</gadget>
<output>140</output>

<result>140</result>