A four-digit number, after removing a 0 at the end, is 5310 less than the original. What is this four-digit number?
一个四位数，末尾去掉一个0后，就比原来少5310．这个四位数是多少？
<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">5_310 / 9</gadget>
<output>590</output>

<gadget id="calculator">590 * 10</gadget>
<output>5_900</output>

<result>5_900</result>