A woolen sweater is priced at 315 yuan after a price reduction of 125 yuan. How much is the original price of this kind of woolen sweater? (solution by equation)
一件羊毛衫，降价125元后的售价为315元，这种羊毛衫原来售价多少元？(用方程解)
<gadget id="calculator">315 + 125</gadget>
<output>440</output>

<result>440</result>