An air conditioner fan costs 450 yuan, a learning machine costs 205 yuan, and an eye protection lamp costs 169 yuan. How much does Xiaohong’s father need to buy these three products?
一台空调扇450元，一台学习机205元，一台护眼灯169元，小红的爸爸要买这3种商品，一共需要多少钱？
<gadget id="calculator">450 + 205 + 169</gadget>
<output>824</output>

<result>824</result>