Apples are 4.19 yuan per kilogram, pears are 5.21 yuan per kilogram, and my mother bought 3.8 kilograms each. How much did you spend in total?
苹果每千克4.19元，鸭梨每千克5.21元，妈妈各买了3.8千克，一共花了多少钱？
<gadget id="calculator">4.19 + 5.21</gadget>
<output>9.4</output>

<gadget id="calculator">9.4 * 3.8</gadget>
<output>35.72</output>

<result>35.72</result>