A washing machine with a price of 1800 yuan, first increase the price (3/10), and then reduce the price (3/10), how much is the current price?
一台售价1800元的洗衣机，先提价(3/10)，再降价(3/10)，现在的售价是多少钱？
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

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

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

<gadget id="calculator">1_800 * (13/10) * (7/10)</gadget>
<output>1_638</output>

<result>1_638</result>