person's salary for one year of work is 1800 yuan and a fully automatic washing machine. He worked for 7 months and got 490 yuan and a washing machine. How much is the washing machine?
某人工作一年酬金是1800元和一台全自动洗衣机．他干了7个月，得到490元和一台洗衣机，问这台洗衣机为多少元？
<gadget id="calculator">1_800 / 12</gadget>
<output>150</output>

<gadget id="calculator">150 * 7</gadget>
<output>1_050</output>

<gadget id="calculator">1_050 - 490</gadget>
<output>560</output>

<gadget id="calculator">7 / 12</gadget>
<output>7/12 = around 0.583333</output>

<gadget id="calculator">1 - (7/12)</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">560 / (5/12)</gadget>
<output>1_344</output>

<result>1_344</result>