A young man arranges his monthly salary in the following way: half of the monthly salary is deposited in the bank, the remaining half of the money is 300 yuan less to repay the mortgage, and the remaining half of the money plus 300 yuan is used for meals, so there is still 800 yuan left, How much is this young man's monthly salary?
一位青年将自己的月薪按下列方式支配：月薪的一半存入银行，剩下钱的一半少300元还房贷，再将余下钱的一半多300元用于餐费，这样还剩余800元，请问这位青年月薪是多少元？
<gadget id="calculator">800 + 300</gadget>
<output>1_100</output>

<gadget id="calculator">1_100 * 2</gadget>
<output>2_200</output>

<gadget id="calculator">2_200 - 300</gadget>
<output>1_900</output>

<gadget id="calculator">1_900 * 2 * 2</gadget>
<output>7_600</output>

<result>7_600</result>