Apples are 3.6 yuan per kilogram, and bananas are 4.5 yuan per kilogram. Aunt Wang bought 2 kilograms of apples and 1 kilogram of bananas. How much did she spend in total?
苹果每千克3.6元，香蕉每千克4.5元，王阿姨买了2千克苹果和1千克香蕉，共花去多少元？
<gadget id="calculator">3.6 * 2</gadget>
<output>7.2</output>

<gadget id="calculator">7.2 + 4.5</gadget>
<output>11.7</output>

<result>11.7</result>