Mr. Zhang owns a house worth 400,000 yuan. Due to his urgent need for cash, he sold it to Lao Li with a 10% discount. After a period of time, the housing price rose by 10%, and Mr. Zhang wanted to buy the house back from Lao Li. Think about it, if Lao Zhang bought the house back, how much would he lose in total?
张老师有一套住房价值40万，由于急需现金，他以九折优惠卖给老李．过了一段时间后，房价上涨10%，张老师又想从老李处把房子买回来．想一想，如果老张买回房子，总共损失多少万元？
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 + (1/10)</gadget>
<output>11/10 = around 1.1</output>

<gadget id="calculator">40 * (11/10)</gadget>
<output>44</output>

<gadget id="calculator">44 - 40</gadget>
<output>4</output>

<gadget id="calculator">4 + 4</gadget>
<output>8</output>

<result>8</result>