5. July 1, 2021 is the 100th anniversary of the founding of our Party, recorded as 20210701, where the sum of the digits in the odd positions is $1+7+1+0=9$ and the sum of the digits in the even positions is $0+0+2+2=4$, with a ratio of $9: 4$; among the 8-digit numbers formed by $0 \sim 9$ (no repetition), how many satisfy the condition that the sum of the digits in the odd positions to the sum of the digits in the even positions is $9: 4$?
【Answer】 2304