The department store sells 3 boxes of vests, each with 20 pieces, for a total of 1,400 yuan. How much is each piece?
百货商店卖出3箱背心，每箱20件，一共卖了1400元，每件多少元？
<gadget id="calculator">1_400 / 3 / 20</gadget>
<output>70/3 = around 23.333333</output>

<result>70/3 = around 23.333333</result>