Oranges cost 1.2 yuan per kilogram, and bananas cost 2.3 yuan per kilogram. Mom bought 1 kilogram each. How much did it cost?
桔子每千克1.2元，香蕉每千克2.3元，妈妈各买了1千克，用了多少钱？
<gadget id="calculator">1.2 * 1</gadget>
<output>1.2</output>

<gadget id="calculator">2.3 * 1</gadget>
<output>2.3</output>

<gadget id="calculator">1.2 + 2.3</gadget>
<output>3.5</output>

<result>3.5</result>