For a four-digit number, the number in the ones place is 6, the number in the tens place is 3, the number in the ones place is three times the number in the hundreds place, and the number in the thousands place is four times the number in the hundreds place ． What is this number?
一个四位数，个位上的数是6，十位上的数是3，个位上的数是百位上的数的3倍，千位上的数是百位上的数的4倍．这个数是多少．
<result>8_236</result>