A kind of suit was priced at 400 yuan last year and 320 yuan this year. How much is the price this year lower than last year? (fill in the score)
一种西服，去年售价400元，今年的售价是320元，今年售价比去年售价降低了多少．(填分数)
<gadget id="calculator">400 - 320</gadget>
<output>80</output>

<gadget id="calculator">80 / 400</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>