A department store sells 18 washing machines in the morning and 13 of the same washing machines in the afternoon. The payment in the afternoon is 3910 yuan less than in the morning. How much is each washing machine?
百货商场上午卖出洗衣机18台，下午卖出同样的洗衣机13台，下午比上午少收货款3910元，每台洗衣机多少元？
<gadget id="calculator">18 - 13</gadget>
<output>5</output>

<gadget id="calculator">3_910 / 5</gadget>
<output>782</output>

<result>782</result>