Xiao Wang sold two washing machines yesterday, each for 819 yuan, one of which earned 30%, and the other lost 30%. Does Xiao Wang sell these two washing machines without loss or profit (explained by calculation)? If not, please calculate how much money you lost (or earned)?
小王昨天卖出两台洗衣机，每台都是819元卖出的，其中一台赚30%，另一台赔30%．小王卖这两台洗衣机是不赔不赚吗(通过计算说明)？若不是，请算出赔了(或赚了)多少钱？
<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 - (3/10)</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">819 / (7/10)</gadget>
<output>1_170</output>

<gadget id="calculator">1_170 - 819</gadget>
<output>351</output>

<gadget id="calculator">1 + (3/10)</gadget>
<output>13/10 = around 1.3</output>

<gadget id="calculator">819 / (13/10)</gadget>
<output>630</output>

<gadget id="calculator">819 - 630</gadget>
<output>189</output>

<gadget id="calculator">351 - 189</gadget>
<output>162</output>

<result>162</result>