Xiaohong originally had 19.04 yuan, but spent 7.8 yuan to buy the notebook, and her mother gave him another 4.5 yuan. How much does Xiaohong have now?
小红原有19.04元钱，买本子用去了7.8元，妈妈又给了他4.5元．小红现在有多少元？
<gadget id="calculator">19.04 - 7.8</gadget>
<output>11.24</output>

<gadget id="calculator">11.24 + 4.5</gadget>
<output>15.74</output>

<result>15.74</result>