A natural number is divided by 7, 8, and 9 respectively, and the remainders are 1, 2, and 3 respectively. The sum of the three quotients is 570. What is this natural number?
一个自然数分别用7、8、9去除，余数分别为1、2、3，三个商数的和为570，这个自然数是多少．
<gadget id="calculator">63 * 2</gadget>
<output>126</output>

<gadget id="calculator">56 * 3</gadget>
<output>168</output>

<gadget id="calculator">570 * 504</gadget>
<output>287_280</output>

<gadget id="calculator">72 + 126 + 168 + 287_280</gadget>
<output>287_646</output>

<gadget id="calculator">72 + 63 + 56</gadget>
<output>191</output>

<gadget id="calculator">287_646 / 191</gadget>
<output>1_506</output>

<result>1_506</result>