The unit price of the clock is 19 yuan, and the unit price of the table lamp is 25 yuan. Xiaohua pays 50 yuan to buy a clock and a table lamp. How much should I get back?
时钟的单价是19元，台灯的单价是25元，小华付出50元，买一个时钟和一个台灯，应找回多少元？
<gadget id="calculator">19 + 25</gadget>
<output>44</output>

<gadget id="calculator">50 - 44</gadget>
<output>6</output>

<result>6</result>