A down jacket is sold for 284 yuan at a discount of 120 yuan. How much is the original price of this down jacket? (Solution of column equation)
一件羽绒服优惠120元卖284元，这件羽绒服原价多少元？(列方程解)
<gadget id="calculator">284 + 120</gadget>
<output>404</output>

<result>404</result>